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AD-RIGS 71t ST CROIX MOORING DESIGN(U) N8VAL FACILITIES ENGINEERING i/I COMMAND WASHINGTON DC CHESAPEAKE DIV W N SEELIG DEC 84 CHES/NAVFAC-FPO-i-84(47) UNCLASSIFIED F/G 0/0 U3 sIIImllmllllll EmIIIIIIIIIIu IIIIIIIIIIhh .2.2 §40 11 -0 .2 11 - 3 - - wQ, - . o- °• .. :, .- ,..- DTIC '-" i . JUN}I6t8 Div SO " i! 00 ST. CROIX MOORING DESIGN Siby ' William N. Seelig 0 FPO-1-84 (47) December 1984 !:Ocean Engineering ".-. JIESAPEA D1VTI ( I~~~it' ! _'q~~~~~~~AVAL% F'ACI [,[TIF.S ,I,'' :.,,[, (,CPtVN ,-V\-. FDeIirN TIp%'; .a<'I D'IV, N_ *.-: hAi Ckur, C it37 SiI --. ,--d j .., .. C." A0tId( pbi 0oS DTIC ELECTE f JUN 1 6 W86I ST. CROIX MOORING DESIGN by William N. Seelig FPO-1-84 (47) December 1984 APPROVED BY: SHUN C. LING . J 12 Director Engineering Analyses Division OCEAN ENGINEERING & CONSTRUCTION PROJECT OFFICE CHESAPEAKE DIVISION P4 NAVAL FACILITIES ENGINEERING COMMAND WASHINGTON. DC 20374 D!STRI 11 18MEM~ A Approvedj fmg Public wee "S Distgibution Unlimited S S Unclassified SECURITY CLASSIFICATION OF THIS PAGE 7 - " REPORT DOCUMENTATION PAGE I la. REPORT SECURITY CLASSIFICATION lb. RESTRICTIVE MARKINGS Unclassified 2a. SECURITY CLASSIFICATION AUTHORITY 3. DISTRIBUTION AVAILABILITY OF REP. Approved for public release; distribution is unlimited 2b. DECLASSIFICATION/DOWNGRADING SCHEDULE 4. PERFORMING ORGANIZATION REPORT NUMBER 5. MONITORING ORGANIZATION REPORT * FPO-I-84(47) 6a. NAME OF PERFORM. ORG. 6b. OFFICE SYM 7a. NAME OF MONITORING ORGANIZATION Ocean Engineering & Construction Project Office CHESNAVFACENGCOM 6c. ADDRESS (City, State, and Zip Code) 7b. ADDRESS (City. State. and Zip ) BLDG. 212, Washington Navy Yard * Washington, D.C. 20374-2121 8a. NAME OF FUNDING ORG. 8b. OFFICE SYM 9. PROCUREMENT INSTRUMENT INDENT # 8c. ADDRESS (City. State & Zip) 10. SOURCE OF FUNDING NUMBERS PROGRAM PROJECT TASK WORK UNIT ELEMENT # # # ACCESS # 11. TITLE (Including Security Classification) St. Croix Mooring Design 12. PERSONAL AUTHOR(S) William N. Seelig 13a. TYPE OF REPORT 13b. TIME COVERED 14. DATE OF REP. (YYMMDD) 15. PAGES FROM TO 84-12 46 16. SUPPLEMENTARY NOTATION 17. COSATI CODES 18. SUBJECT TERMS (Continue on reverse if nec.) FIELD GROUP SUB-GROUP Mooring systems. Mooring design. St. Croix 19. ABSTRACT (Continue on reverse if necessary & identify by block number) This report presents the design of a mooring to service surface ships and submarines operating off the west coast of the island of St. Croix. West Indies. This emergency mooring is required because the nearby Frederiksted Pier was damaged during tropical storm "Klause" on 1 November 1984 (Con't) 20. DISTRIBUTION/AVAILABILITY OF ABSTRACT 21. ABSTRACT SECURITY CLASSIFICATION SAME AS RPT. _22a. NAME OF RESPONSIBLE INDIVIDUAL 22b. TELEPHONE 22c. OFFICE SYMBOL Jacqueline B. Riley 202-433-3881 DD FORM 1473, 84MAR SECURITY CLASSIFICATION OF THIS PAGE M-.. .. . . . . .. .- ' . BLOCK 19 (Con't) . Little geologic or environmental data are available for the site and the emergency mooring is needed quickly. so the following approach is used in F..des ign: 1. The mooring will accommodate large submarines ("Lafayette" SSBN 616 or smaller) and a wide variety of surface ships ("Spruance" DD 963 was selected as typical). These vessels have the following characteristics: Ship Class Ship Length Max. Nay. Draft Mooring Swing (ft) (ft) Circle (ft) DD 963 "Spruance" 564. 30. 750. SSBN 616 "Lafayette" 421. 32. 560. 2. Both static and dynamic ship/mooring forces and interactions are considered and a Class A mooring with 100 kips working holding capacity was selected. This corresponds to a maximum 2.0 knots current with a simultaneous 50 knot. 30-second duration wind. The surface ships control the design forces. The buoy is to be located 500 yards north of the pier in a water depth of 60 feet. 3. Because of the great uncertainty in bottom conditions the mooring will be installed and tested and the rating of the mooring will be re-evaluated. 4. A site survey is planned in January 1985. Design adjustment may be made based on those survey results and/or installation experiences. Drag anchors as well as Propellment Embedment Anchors will be mobilized to cover - . installation contigencies. .'U -$ .. . eq St. Croix Mooring Design EXECUTIVE SUMMARY This report presents the design of a mooring to service surface ships and submarines operating off the west coast of the island of St. Croix. West Tndies. This emergency mooring is required because the nearby Frederiksted Pier was damaged during tropical storm "Klause" on 1 November 1984. M Little geologic or environmental data are available for the site and the emergency mooring is needed quickly. so the following approach is used in design: 1. The mooring will accommodate large submarines ("Lafayette" SSBN 616 or smaller) and a wide variety of surface ships ("Spruance" _. D 963 was selected as typical). These vessels have the following K, characteristics: Ship Class Ship Max. Nay. Mooring ' Length Draft Swing (ft) (ft) Circle(ft) * DD 963 "Spruance". 564. -- 30. 750. SSBN 616 "Lafayette" 421. 32. 560. 2. -Both static and dynamic ship/mooring forces and interactions are considered and a Class A mooring with 100 kips working holding capacity was selected. This corresponds to a maximum 2.0 knots current with a simultaneous 50 knot. 30-second duration wind. The surface ships control the design forces. The buoy is to be located 500 yards north of the pier in a water depth of 60 feet.' 3. Because of the great uncertainty in bottom conditions the mooring will be installed and tested and the rating of the mooring will be re-evaluated.., 4. A site survey is planned'in January 1985. Design adjustments may be made based on those survey results and/or installation experiences. Drag anchors as well as Propellment U Embedment Anchors will be mobilized to cover installation contingencies. Av'iiaiiity Codes -' s Avail and/or / ,: DI si Special L**$j:C d DESIGN OF THE ST. CROIX MOORING by William N. Seelig. P.E. CONTENTS EXECUTIVE SUMMARY CONTENTS INTRODUCTION I DESIGN CONDITIONS DESIGN FORCES ' MOORING DESIGN ru MOORING LOCATION "- INSTALLATION SEQUENCE SUMMARY 4 ~ TABLES FIGURES . " APPENDICIES f. A. FORCE CALCULATION FOR SSBN 616 " *- B. FORCE CALCULATIONS FOR DD 963 C. BUOY SURVIVABILITY 4 D. CATHODIC PROTECTION FOR CHAIN -/ DESIGN OF THE ST. CROIX MOORING * by William N. Seelig. P.E. U INTRODUCTION The purpose of this mooring is to service submarines and surface vessels operating off the western coast of St. Croix. West Indies. " The mooring is needed because the Frederiksted Pier was damaged in a storm (Figure 1). -W The approach taken in this design is to custom design a mooring for the site using mostly standard materials available in U. S. Navy Fleet Mooring Inventory. Both static and dynamic behavior of ships in the mooring are considered. Propellment Embedment Anchors (PEA) are specified as the primary anchor type, due to the poor bottom conditions in the area. A "soft" buoy and protective collar around *the chain riser are used to protect contact with a submarine coming close to the mooring. A sinker and three ground legs are used to provide dynamic energy absorption in the mooring. DESIGN CONDITIONS 1. Vessels. It is not known exactly what vessels may use the mooring, so the design is tailored to service all submarines of "Lafayette Class" (SSBN 616) and smaller. The "Spruance Class" DD 963 was taken as representative of U. S. NAVY surface combatants. A list of vessels authorized to use the mooring will be made once the mooring is installed, tested and rated. 2. Environment. A 50.0 knot wind with a 30-second duration was selected for design based on engineering judgement. Note that this operational wind speed may have to be adjusted based on the rating assigned to the as-built mooring. }- 3. Tide. The normal tide range at the site is 0.8 feet with an extreme tide range of 1.8 feet. 4. Currents. Little is known about the currents in the area. Howard Kelly (LANTDIV. phonecon of 12/10/84) states that current speed varies with location, but could be up to 2 knots. A design current of 2.0 knots is therefore specified. More information on currents should become available as a result of a planned site survey and based on observations made during mooring installation. - . .... '6 - * .- - . i i . * -- . * ** L 5. Bathremety Data. Chart Number 25644 (May 1975) and NOAA survey files (personnel communication. National Ocean Survey) S--provided water depth and bottom conditions data. National Ocean Survey study of the area shows that the bottom is a combination of coral and sand (Figure 2). 6. Additional Data. An Underwater Construction Team One (UCT-l) is being planned for January 1985 which should provide additional * information on bottom type, sediment thickness, bottom slope, water • 2depths and current speeds. DESIGN FORCES i iThe mooring design is based on static and dynamic design forces. A ship in a mooring may have much different motions than an unmoored vessel at the same site. This dynamic behavior depends on characteristics of the mooring and ship. Therefore, an iterative design procedure was used and many alternative designs considered. - Only the selected design is presented in this report. 1. STATIC FORCES. Methods in Design Manual 26.5 "Fleet Mooring" (95% Submittal) were used to calculate static mooring forces. In this method the O design current speed of 2.0 knots was used. Thirty second wind speeds of both 35 and 50 knots were used to obtain data on the sensitivity of forces on wind speeds. Calculation in Appendicies A and B were then used. together with a computer program, to find the * equilibrium position of the vessel (Figure 3). Once the equilibrium position is known the required static mooring hawser tension (Figure *3) is also calculated using the computer program. Calculation procedures are described in great detail in DM 26.5. so they are not *, repeated here. * .Little is known about the direction of currents and winds at the design site. Therefore, the approach taken here was to assume that r .the winds and currents could come from any direction. Relative wind/current directions at 10 degree angle increments were all analyzed and the combination of directions that gave the highest mooring force were selected for design. These static design equilibrium forces are given in Table 1. . b- . . * '. * - ,** . 2. SHIP DYNAMICS - YAW. Even in relatively steady wind and current conditions a vessel moored to a single point mooring may experience dynamic action. Many references document this "fish-tailing" illustrated in Figure 4 (see Chrenshaw. R. S.. Naval Shiphandlinq, Naval Institute Press, Annapolis, Md., 1975). "Fish-tailing" occurs because the total moment curve of the ship in the mooring may have a flat slope near the "equilibrium" position. Even a very small pertubation in forcing causes the ship to yaw from equilibrium (Figure 5). Ship inertia together with the flat sloped moment curve means that the -ship may have +/-20 degree of yaw from equilibrium before the ship is brought back towards equilibrium. The main consequence of this yawing action is that mooring hawser forces are greatly increased. For example, the DD 963 calculations shown in Figure 5 indicate a 42 kip static mooring load at equilibrium that jumps to 96 kips at +/- 20 degrees yaw (wind and current azimuth both 270 degrees for the example shown). Design forces including the +/-20 degree yaw are shown in Table 1 for the DD 963. Values at +/-10 degree yaw are used for the SSBN 616 (Figure 6 and Table I). The smaller value of yaw for the submarine is justified based on the fact that the total restoring moment on a SSBN 616 is higher than for a DD 963. 3. DYNAMIC FORCES - SURGE. A ship may also surge while in a mooring. Surge may be especially important, even if it is small, because (a) moorings may be highly non-linear and a small change in ship deflection away from the ground ring will produce a large increase in mooring force and (b) the ship and mooring (if poorly designed) may get into a resonance condition where motions and forces can be amplified. Surge dynamics are investigated in this report by use of a one-dimensional computer program that simulates important aspects of e the mooring, ship and forcing. Details of this numerical model dre too complex to present here. The following gives a summary of important computer program components: a. The mooring is represented by the non-linear load/deflection curves shown in Figure 7. Deflection (surge) of the bow of the ship away from the ground ring is shown on the x-axis and - .restoring force in the mooring shown on the y-axis. The load/ deflection curve includes non-linear stretch of the mooring hawser (if any), submergence and rotation of the buoy, displacement of the riser catenary, lifting of the sinker, lifting and the catenary of ground legs. 'I•° p,.. -- -- - b. The forcing wind is generated by the computer using the wind spectrum presented in Vellozzi. J. et al. "Gust Response U Factors", ASCE, Structural Division, June 1968, pp. 1295-1313. This generalized wind spectral shape was developed by analyzing records from 90 storms under a wide variety of conditions. The computer takes the spectrum, uses wind energy components wLth periods between 5 seconds and one hour and generates the instantaneous wind acting on the vessel at one second intervals. A sample wind time history * is given in Figure 8. c. Hydraulic forcing on the vessel includes a steady * current and reversing current component due to long waves. d. Ship response/forcing includes: ship mass: added - mass: damping; non-linear wind forcing; non-linear current forcing including the effects of the ship motion; and non-linear restoring forcing of the mooring. The solution is a time-marching scheme that updates the forcing and ship conditions at one-second intervals. Conditions are modeled for 1000 seconds and the highest predicted mooring hawser tension reported. Sample computer plots of mooring hawser tension are given in Figure 9 (DD 963) and Figure 10 (SSBN 616). The destroyer is predicted to experience significant dynamics during a storm, while the submarine remains relatively static. These and many other computer plots show that the ship/mooring combination is well k matched and that yaw action produces the highest total mooring force (Table 1). MOORING DESIGN The selected mooring design (Figure 11) was evolved after considering many factors: a. A Class "A" mooring with 100 kips restoring force is desirable. b. The SEACON will be used for installation. c. The SEACON can easily mobilize any materials from the inventory of Fleet Mooring Materials in San Diego. d. Installation is planned for early 1985. e. The mooring will be used for surface ships, which require . moorings with good energy absorption characteristics. f. Submarines will use the mooring, therefore the buoy should be - soft and the riser chain will be protected to minimize the possibility of metal contact with the submarine. g. Propellant Embedment Anchors are used as the best and most cost effective method of providing anchoring considering the bottom type. However, since bottom conditions are poorly known. Stockless Anchors will also be mobilized as a continency. E.-. S. Predicted characteristics of the mooring with some notes are shown in Figure 12. Note that the energy absorption characteristics of the mooring are good throughout the working range of the mooring. Materials to be mobilized for this mooring are given in Table 2. This list includes some spare materials. Cathodic protection for the chain is illustrated in Appendix D. Three 20-kip Stockless p Anchors are also specified. These anchors could be used in various combination, if one or more of the PEA placements are unsuccessful. Another advantage of mobilizing these anchors is that they are needed for other projects on the U. S. East Coast, if the PEA's are " successful. MOORING LOCATION A study of the required swing circles (Table 3), required water * depths, bottom slopes and use of the mooring suggests that the site shown in Figure 13 is by far the best location for the mooring. Figure 14 shows the ships in the mooring at scale with the ship perpendicular to shore. INSTALLATION SEQUENCE The following general installation sequence is recommended. More detailed installation plans will be formulated by the FPO-l Construction Division as the project progresses. 1. Mobilize to the site with materials. U 2. Locate the mooring site. 3. Locate the exact position of two of the PEA's. . 4. Install. set and test the two PEA's. 5. Attach one ground leg to each of the two PEA's. attach riser. - buoy, sinker and ground ring. Also attach the third ground leg. 6. Put the mooring in the water. - 7. Tighten the mooring by pulling the mooring towards the third anchor site. * 8. Locate, install and test the third PEA. 9. Attach the third PEA. * - . -_ .-- - *-".* . . .-' .... * .'. . - .•--.*? .. . - *'- -. . - ." - ..- - .- • , ,'* ', * . - p . . * - .. .r SUMMARY A mooring design is presented for western St. Croix to service submarines and surface ships. Mooring use, performance characteristics, environmental conditions, the site, installation equipment and available Fleet Mooring Inventory materials were all considered in formulating the design. Unique features of this mooring are that a "Soft" mooring buoy and covering riser chain are provided to minimize the possibility of damage to a moored submarine. This mooring should be installed and each anchor leg tested. At that time the capacity and use of the mooring will have to be re-evaluated. This procedure is recommended due to the uncertain * .conditions at the site. In .: • -I .I 7 . if S- ." - , -- . " • - ." ,' - ---- .. " ' : ; : - CHESAPEAKE DIVISION PROJECT: --4. CViXiccin e Naval Facilities Engineering Command NOW Station:________________ S DISCIPLINE E S R: _ _ __Contract: _ _ _ _ _ Caics made by: LA Setq date: /212 Calculations for: _6'kV, GN3" *1, Caics ck'd by: date: ____ a iA& D9 6.3 -p"e hta4.O,4, e", __ 5oc. 5,5. 4'-0 3561. CGN 33 36 61, 3.?..6 24q 30 Zx *~Cz Q1AQ0, .50 irmC)W O~ t~ w v/l (~t r C~~~I(CT-1 Ae2 4 ; CG;N 38 Cc-vs page... of ~5 J o - l~p 1 _ - ,, * CHESAPEAKE DIVISION PROJECT: 2# L > Y5r Naval Facilities Engineering Command NOW Station: S .DISCIPLINE E S R: Contract: L.-I ' : - Caics made by: LA'. 2eedate: V1/' k Calculations for: If'A,. ._ . LP -4 Caics ck'd by: ,- , date: ._ _ _ _ _ _ _63 L lBT LH)t,6(A ve, OIDe (T -U I" m 1L D- 74. . . /Oo. i, i'66Q. * ~~-f~ LPO-Y- kh&,. a6%ofr : " /00 ,,. i,.,C15 V oQ-,,-& le) . 5" k %,4 fwi,,A /OC)'V , .J\C Ccv so 4. -I' ,"(. page of [, , , ~~~~~~~~~~~~~~... ,:.. ,....L... ..... . .t¢ ._ . ,... ...... .;..... _........,.....,. C6 PO- 4 C-U ,- &6 d-. Cu? S Table 1. DESIGN FORCES 30-second duration design wind speed =50 knots design current speed = 2.0 knots* Design Load Between Ship & Mooring (Kips) Condition "Spruance" DD 963 "Lafayette" SSBN 616 L 564 ft L = 421 ft *- Static Equilibrium 42 7.5 - Static + Dynamic Yaw 100 (+/-20 deg) 31 (+/-10 deg) Static + Dynamic Surge 56 8.2 -[ *Relative direction between wind and current selected for each *[ case to give the highest load. -. *_ _ m _ - * . . -* Table 2. Mooring Materials to Mobilize to the Site Item Total Number (including spares) 2 1/4" Chain 13 shots (or 12 shots + short Usections) 2 1/4" Shackles 6 " 2 1/4" Detachable Links 17 - 2 1/4" Anchor Joining Links 10 2 1/2" Anchor Joining Links 3 2 1/4" Size Ground Ring 1 2 1/4" Sinker Shackle 3 16 Kip Stockless Anchor 1 20 Kip Stockless Anchor 3 U 100 Kip PEA Package 4 20 Kip Reserve Buoyancy Buoy 1 (soft type) 2 1/4°1 Pelican Hooks 2 Chain Cathodic Protection Assemblies 10 2 1/4" Pear Links 4 Tires As Needed be........... . Table 3. ship/Mooring Characteristics ship Class Ship Approx. Max. Nay. Mooring Length Hawser Draft (ft) Swing (ft) Length (ft) Circle "SpruanCe" 564. 150. 30. 750. DD 963 4 "Lafayette" 421. 100. 32. 560. SSBN 616 A.- V .--. -- r4 L - - .Q3 a_ C) - r1 C;)- CC) LAJ El -, U4 ,q. S Is icoe F IGU RE 2. PHOTO COPY OF NATIONAL OCEAN 'URVEY HYDROGRAPHIC RECORDS FOR THE SITE H: CHESAPEAKE DIVISION PROJECT: St. Croix Moor i ng Naval Facilities Engineering Command NOW Station: _______________ SDISCIPLINE E S R: ____Contract:_____ SCaics made by: W. SEEL I dae 12/ 14/ 'acatosfor Ship in Mooring Caics ck'd by: date:____ 0c I-z SO it IL . 0ea 1+ *k OUI IB IU CG. -C GJIIEF IV (AFTER jOADINh ( 7II1RU PQOLSIUTCION..(EFR . (AFTER LOADING) POSITION BEFORE LOADING Figure 3. SHIP IN A SINGLE POINT MOORING * ., page .. of 0 - -i ............... . . - CHESAPEAKE DIVISION PROJECT: St. Croix moourin Naval Facilities Engineering Command NOW Station: _________________ DICPIEE S R: ___ ___Contract: ________ Caics made by: W. -s e i - date: 12/14/ 4 Calculations for: 'Fish Tailing'' - Caics ck'd by: /date: _______________________ *5 - 5 - 5 5S6_ -< -0, Uk -~j 10,. . -- PATH OF WIND FROM AHEAD PIVOT POINT F IGURE 4. A SHIP FISH TAILING IN A SINGLE POINT MOORING page -of- ib! -i WIND - 50 Knot; CURRENT 2.0 Knots PS) 22& 18 HAWSER TENSION 12 I& -. K9 P d. 3 200 YAW 60- A B 0 :.0 80 120 IS 3mO TOTAL MOMENT _/ ON VESSEL SHIP AZINUTH(DEG) SPRUJANCE-00 963 A - SHIP MOORED BY BOW B - SHIP MOORED BY STERN FIGURE 5 MOORING HAWSER TENSION FOR A DD 963 AT A SINGLE POINT MOOR UNDER "EQUILIBRIUM" AND VARIOUS AMOUNTS OF YAW F..- WIND 5 50 Knot, CURRENT - 2.0 Knots I. I I PS) 140- 12- 80 5(L K IPS 50. 200 YA14 40 2&~ KIPS 20 100 YAW -"EQUILIBRIUM" 0 L. : 0 e ,/120 1€O 300 SHIP AZIMUTH (BEG) LAFAYETTE - SSBN 616 * , JRE 6. MOGRINr HAWSER TENSION FOR A ISBN 016 AT A SINGLE POINT MOOR UNDER . '"EOU LIBRIUM" AND VARIOUS ArO HLINIS O)F iAW 2 -. 2I CHESAPEAKE DIVISION PROJECT: St. Croix fooring Naval Facilities Engineering Command NOW Station:.-_ DISCIPLINE E S R: Contract: -"o SEELI:Load/Deflection Curves- Calcs made by: w. SEELIG date: 12/I 4/8 Calculations for: Load/ De fletoCrvs Calcs ck'd by: ",.date: . IWT - ; 80 _DEFLECTION CF A SHIP FROM THE GROUND RING I Ia_ 70 VS. APPLIED HORIZONTAL i .,i LOAD I ~1/ DD 963 ' C) 0 +- +--------+--------+-- ---- f-'---+---- 0 5 10 IS 2 a 30 35 40 45 50 55 DEFLECTION, d (ft.) page _ of ___ lI ,RE 7. LOAD DEFLECTION CURVES FOR SHIPS IN THE MOORIN . . . . . " • " " * " - " . " • * . . . . -. .A ; - .: ' F.- - -. . . . . . ) -- ~,--..w -L-.--J - - -- ,-. .- ' -- - -.---- ,*---------.~ 12 LflJ rj < - .c C0 u C)p 0j C)i C) ~Li u Uj 4 W-4 Lj (salA0 -OS3 8SV I.T 00 ~~CD C) C) C) -LJ U-,NOS3 HSV w U z 0 z z wU w 0 UlI) OM z '& W 0 w . d 0 C n ] C.] - ~ C.] C3 H 4-. 4- 4 CO Cl) Cl~ LI C> i C C z Ll ac 0. 0 z .0 4 02 3:Z >4 >l -l 1)1. -j -2 020 .9 . - C z. 0 zJ z z :71 0 C b - CHESAPEAKE DIVISION PROJECT: , ,__ _" _ _ Naval Facilities Engineering Command NOW Station: A DISCIPLINE E S R: Contract: Calcs made by: _ _ _ date: Calculations for: - ,: Calcs ck'd by: date: I 100- .- - -- , I '' Surface ship in the mooring rI - r C) 40+ A - / DEFECTON d (ft.) II r.- F *0tO a) 30 40 ' DEFLECTION, d (ft.) page of * GPO A65-1553 FIGUPE 12. PPFDICTED MOORING CHARACTERISTICS I -I . i -: i , i . ,- . . 1 i. - . ] , . " - - -" 1000 f~u U\ " \ WATER DEDTH ISO\ / 5o4o' AT BUOY: Water depth = 60' MOORING 17' 43' 09" N - BUOY SING CIRCLE 640 53' 30' W . 500 yds north of pier i "- S' j ING' C I RCLE DD 363 FIGURE 13. MOORING LOCATION 40o' pqo " .-. " " - -" ' " , . : .'). , . . - .. , .- - . . o P . o % , CHESAPEAKE DIVISION PROJECT: /0 Naval Facilities Engineering Command NOW Station:_________________ * I DISCIPLINE E S R: ______Contract: ________ Calcs made by: .'See,., date: 12.h,4- Calculations for: Caics ck'd by: date: ____ _____________________ DD 963 ICP SSA 61 F~rjRE 4. ROFIE V EW F TY ICA 'H PS I TH MO RIN pag APPENDIX A. FORCE CALCULATIONS FOR SSBN 616 04 - 26.5 "Fleet Moorings" is used in this appendix to calculate forces and moments due to wind and currents on a '-- Lafayette" Class submarine. Here force and moment calculations art made only in dimensionless form. A computer program is then used to make detailed calculations and to determine the corrosponding mooring forces. The approach taken in this appendix is to directly quote and use equations in the DM. DM 26.5 (95 ) can be referenced for a detailed description of equations and variables. '3 °U - CHESAPEAKE DIVISION PROJECT: ' ," ,.. Naval Facilities Engineering Command NOW Station: DISCIPLINE E S R: Contract: Calcs made by: v i. date: 12 /'RY Calculations for: .SS. -. Calcs ck'd by: date: LY r e. - - £I . , : 6 cL. "I :,.L " /4? 7o " Z (,e,- ,4 LO 0t1 ,k, hx evi (0-75) qF70 v.page- of I I - ": -f '-':" " ., ' -" : . ---. i " . .- i . ? -: : - I '! - " -; ' ' " - - ' " ' , - " - '' : ' , :- ,,d. L' ,,./ ,a d..' i' ',m - - " ""- '. . "" " -" "" "''". . "" ' CHESAPEAKE DIVISION PROJECT: Naval Facilities Engineering Command NDW Station: DISCIPLINE E S R: Contract: Calcs made by: date: Calculations for: La; f-, Caics ck'd by: / date: C _ , ~tA4~AQC LA L "o.e(AL!v;a . " " ,F 7 , W. -3) Ly:07 xg-.)c oq ' V S page Of £7OO C\C/-6-33 ( : 3. . ..... #(A-.7~ -09 ,,. ~~*-* ,,.,*,, ,,. .. _< . ,.,. .-.-..... - , ...... ". . 'dli CHESAPEAKE DIVISION PROJECT: Naval Facilities Engineering Command NOW Station: i DISCIPLINE E S R: Contract: Calcs made by: date: Calculations for: " . :: .- Calcs ck'd by: -.- , - date: ; IO_ el CA d C- V VC, ,Cos .:-- tI. :- - iT l/, Ac" I2. 1 (e3 fa3 AftJ /ie ~ q~ (~) / 3 2. 6/a (I- ) F, -7 . page - of - -.. -; ... - -- :.- .- * .. .. ..*:-a ..a. . a.. . . a . A . .. - -. - ........ . . . . . APPENDIX B, FORCE CALCULATIONS FOR DD 963 - DM - 26.5 ''Fleet Moorings'' (5)is used in this appendix to calculate forces and moments due to wind and currents on a "S.ruance" Class destroyer. Here force and moment calculations are made only in dimensionless form. A computer program is then used to make detailed calculations and to determine the corrosponding miooring forces. The approach taken in this appendix is to directly quote and use equations in the DM. OM 26.5 can be referenced for a detailed description of equations and variables. ol * . *-APENIX..FOCECACUATON FO DD *.963.. ' L,-- CHESAPEAKE DIVISION PROJECT: Naval Facilities Engineering Command NOW Station: I DISCIPLINE E S R: Contract: Caics made by: date: Calculations for: Calcs ck'd by: date: S,~l di "00, I * )&.&' ("/a ,o,'t,) Lzo'.o rn''o.,]I1 4, o L.- F- -i.o2-)Y (aq3) page of ~•p- ' • "1 * - : . .: - " , - . - . l ° I | l I I y r r r - . CHESAPEAKE DIVISION PROJECT: "-* I Naval Facilities Engineering Command NOW Station: DISCIPLINE E S R: Contract: * Calcs made by: date: Calculations for: " Calcs ck'd by: . . date: ,fP~ vv,~\(a~ ~3~. V(,C/W (& (p C( 12~ pag e- 56 ** .. 0- .**. * .4-. * *i- 0 wS - 0 I.-U ,o Ilk V COO 0,.6 0 -103 : CHESAPEAKE DIVISION PROJECT: Naval Facilities Engineering Command NOW Station: DISCIPLINE E S R: Contract: Calcs made by: date: Calculations for: Caics ck'd by: -date: _--. f- 1y,- _ 1 (aj k,.J: 'S2'1/ ,&. )(o. V4 s/, c - !/ , ? a " . U D (§-4r:) y,-v: (s2 ) r&C,,co14 oI +o /( r ~ ~ ~ 1 4L ~&Ctc 0 :L-:-- :4 <_ , 2 6 - (24) Vc (3:9)(t') page of 6 ° ' "" - t P AWi. S ~ - - - * CHESAPEAKE DIVISION PROJECT: ___________ Naval Facilities Engineering Command NOW Station: _________________ I DISCIPLINE E S R: _ _____Contract:_________ Caics made by: __ _______date: Calculations for:_______________ Caics ck'd by: date: ______________________ page - of - *APPENDIX C. BUOY SURVIVABILITY * This appendix addresses the ability of the buoy to survive various e~vents. 6L CHESAPEAKE DIVISION PROJECT: S4f. C&',-0t* fMkovtr * Maval Facilities Engineering Command NOW Station:_________________ * DISCIPLINE E S R: ______Contract:________ Caics made by: W.Seb date:I.4~Cluain o:fL~/S~v~~il Caics ck'd by: 114.... date:___________________ II- - vessw acid&.'tiy Vcs,"s /h 4$-t aro 6h.b~~ 1y I's "T04*. pa4 (v-',ik rI40eV'k £41/ k * k2e~LLII~26wA- 4j buiov. S~v.mwa-t '~od 0 ~ teJ Pv6r.4A ave- ftb4t~ If- #'-t- prbpdkv~v~ s-j lip ale)of~~j~ o~~ ~ +1.4 Ebsy. r~e.f~ ~ iOte ~~~a~~e~~~I& Res-6. o 13'~ o CHESAPEAKE DIVISION PROJECT: .f CvOl. 0t0ooviAj - Naval Facilities Engineering Command NOW Station: j DISCIPLINE E S R: Contract: Calcs made by: W. , l date:/2//3/ Calculations for: tko Y 1VYl' itL Calcs ck'd by: - date: _ 14. dy 61e w JArA 0Is. an ,se-ei Mt- 6I- - t 'C ! ' Gt *o .me ) , .' ' o , ', i~~ ?M . e F,. 7-'Y/7 4- , * :-.: p a g e I- op .v% ., U , covfs 64 b/yA44,,) (-FJP /177. Goo.G., *' ' .% % " - . ' - - " ., , .. ,. -. ' .= ' d ," . " . " # ." .p . ". " ," . ". " " .. . -- - .,. ;-"- a . €-*:-- . .-. ,. ., .,. -- , ..,,' ' - '/ '/ , ,' ',, .. ,.. ' ... .,-......,.,. ., CHESAPEAKE DIVISION PROJECT: .,. C ti Naval Facilities Engineering Command NOW Station: A DISCIPLINE E S R: Contract: Calcs made by: e date: 2 Calculations for: P;Ao' S A i vwve Calcs ck'd by: _ _ _ _ __date: Ue mPd- , F' 7- 6 Co =0.7 -qL .. Fa= o.,, o b b _L4 k ( (7-2t) LA:: .±i.. . C o~ ( 2W(1 t l)/L ) 2.. o 6. C---b/la ' .., .Page 2. of GPO RSS-6-3 ,' - . " , . ' - '-" . . ", -" . - . . . . . . - . . . . . . CHESAPEAKE DIVISION PROJECT: -'f. i Naval Facilities Engineering Command NOW Station: N DISCIPLINE E S R: Contract: Calcs made by: W. S date: Calculations for: 13 4 $wa 0,6'/), . Calcs ck'd by: date:_ __- __ ?',' * (-{rN' - LL (.o) (/.o) i.d to S~12 63) 4 -S PM) tf4' t~ 45 0./OY' ." . ,- - S , V,, .-.. ..... 0 6... i~~R ofd_=O GP KAS- CHESAPEAKE DIVISION PROJECT: S. C/01, Naval Facilities Engineering Command NOW Station: DISCIPLINE E S R: Contract: Calcs made by: L. S c, date:l . Calculations for: J& ' v'w, ij,,h -* Calcs ck'd by: .. date: -__ fIr CA -a WA-4v~z t(2/~/~~ dJ" A~rc&- LUJo4 toe;I rk f 4e fllcxy7, bkoy# twvi/l So4wy 11 10'AdLf~~ (AcIbe l H-'DWW; b 4.4 ai be /~~iA. # 4-r&,- 7 (Mil a~~~ 'Sa A O ibcior J page of "Fl - ' APPENDIX D. CATHODIC PROTECTION FOR CHAIN The chain cathodic protection design developed for use at b G 4' !-. p. . °, u p. ,go . . ~ :l~p~US~E ONLY CONSTRUCTION OPERATIONS PLAN 7cAVFACENGCOM OPORDER 6-80 TAB A TO APPENDIX V TO ANNEX B SACRIFICIAL ZINC ANODE ATTACHMENT DETAIL *w x ) 0 L L 0 4)~ CL Q)X: u 3 0. ~ ~ 7 C> t 0 -a - . @ >.0 >L 0. * - 0 0 m . %-3 - *,r O C'I a- * U E _ EL o 00 Ln L) 0 ) 0 'a E >E 39 E.C ) 0 (a . - C cu C CeGL u0~~ L-~ _r 0 L> 0 LaJ La.l - u-~~ L 0L- 'v~~~U 0D4 Q 0r N In 0 - C)~~~ ~~~ 001a 4a -0 Uc Lr% c o 1 W ) w m o Co - LU tn 0 0)0- ., LL) a) 0 _____ ____o a. U NX u1.L E-LL 0 co Q 7.)0 B-V-A-i FOR OFFICIAL USE ONLY . . . . . .. I w 1 . .. . -p ~ ........~..-.iK.. ~ % - - .. - - -