Trim and Stability Report for M.V. Storm Warning
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1 Pacific Motor Boat Design/R. W. Etsell, P.E. Naval Architecture and Marine Engineering Trim and Stability Report for M.V. Storm Warning for Kimberlin s Water Taxi Valdez, Alaska Prepared by Richard W. Etsell, P.E. Project No. 651 March 25, 2011 Revised July 28, Washington Blvd Anacortes, WA (360) rick@etsell.com
2 Trim and Stability Report for M.V. Storm Warning Contents 1. Summary and Operating Recommendations General Notes Principal Particulars and Capacities Trim and Stability Calculations Passenger Service Condition A, Full Load Departure... 5 Condition B, Light Arrival Condition Trim and Stability Calculations Cargo Service Condition C, Departure Max. Cargo... 9 Condition D, Arrival Max. Cargo Condition E, Departure Max CVCG Condition F, Arrival Max CVCG Intact Stability Standards Lifting Appendix A -- Inclining Test Results Appendix B -- Hull Model Appendix C -- Hydrostatic Properties Appendix D Crane Specifications Washington Blvd Anacortes, WA (360) rick@etsell.com
3 1. Summary and Operating Recommendations This report presents intact trim and stability calculations for Motor Vessel Storm Warning, an aluminum small passenger and deck cargo vessel. Based on the results of an inclining test performed after completion of modifications to the vessel, the trim and stability characteristics have been evaluated and compared with applicable standards. The results, as outlined in this report, indicate that the vessel has adequate stability under all normal operating conditions, provided the recommendations and guidance contained in this report are followed. Compliance with the following U.S. Coast Guard stability criteria of 46 CFR Subchapter S is demonstrated herein: (Wind-Heel Criterion) (Righting Energy Criteria) (Passenger-Heel Criterion) (Lifting) Operating Recommendations: The following recommendations are offered for ensuring that adequate stability levels are maintained: 1. ROUTE: Near Coastal routes in and around Valdez and Prince William Sound, Alaska. (Considered Exposed Waters for stability purposes.) 2. HULL OPENINGS: Any openings that could allow water to enter into the hull or deckhouse should be kept closed when rough weather or sea conditions exist or are anticipated. 3. WEIGHT CHANGES: No significant fixed weights shall be added, removed, altered and/or relocated without evaluating their effect on stability. Such changes will cause this report to become invalid. 4. BILGES: The vessel s bilges and voids shall be kept pumped to minimum content at all times consistent with the pollution prevention requirements. 5. LIST: The Master should make every effort to determine the cause of any list of the vessel before taking corrective action. 6. STABILITY INFORMATION: This report contains information needed by the Master to assess the trim and stability of the vessel under normal operating conditions. A copy should be kept aboard and reviewed by anyone who will be operating the boat. This report is valid only for "Storm Warning", and becomes invalid if any changes are made to the vessel that could adversely affect her stability. Cargo Loading Guidance: 1. A maximum cargo weight of 15,000 pounds may be carried as long as the cargo height does not extend above the height of the handrail around the cargo deck. 2. A maximum cargo weight of 8,000 pounds may be carried with up to 20 square feet of exposed profile area of cargo extending above the height of the handrail around the cargo deck. Trim and Stability Report for M.V. Storm Warning 1 R. W. Etsell, P.E.
4 3. Whenever heavy cargo is carried, the number of passengers shall be limited to 12 (in addition to the crew.) Responsibility of the Master: These recommendations and instructions should ensure adequate stability under normal conditions. They are not, however, intended to override the judgement of the Master, who must use every means at his disposal to ensure that the stability of the vessel is adequate to meet the sea and weather conditions encountered. Richard W. Etsell, P.E Trim and Stability Report for M.V. Storm Warning 2 R. W. Etsell, P.E.
5 2. General Notes 1. All weights and displacements are in long tons, unless otherwise noted. Note: 1 Long Ton. = 2240 pounds. 2. Longitudinal positions are referenced from midship. Positive values are aft and negative values are forward of midship. For purposes of this report, midship is located at Frame 5, which is 8-feet forward of the house bulkhead.. 3. Vertical positions are referenced from baseline unless otherwise noted. (Note: The baseline corresponds with the bottom of the keel.) 4. Trim (in feet) is calculated as the difference between the drafts forward and aft. (i.e., a 0.5 ft trim by the stern would mean that the stern is down 3 in, and the bow up 3 in, from a level waterline.) 5. Liquid densities used herein, unless otherwise specified: Salt Water 8.54 Pounds per gallon. Fresh Water 8.33 " Diesel Oil 7.25 " Lube Oil & Waste Oil 7.36 " Sewage 8.54 " 6. Abbreviations: ABL Above Baseline. BL. Baseline. CG. Center of Gravity. E.R.. Engine Room F.O. Fuel Oil (Diesel). FSM Free Surface Moment. F.W. Fresh Water GM. Metacentric Height LCG Longitudinal Center of Gravity. VCG Vertical Center of Gravity. CVCG Cargo Vertical Center of Gravity, i.e. the height of the cargo s CG above deck. 7. Downflooding points: Lowest downflooding points are at the aft Engine Room air vents, located in a trunk on centerline above the aft deck. X = aft, Y = 0.88' Off CL, Z = 6.86' ABL 8. Passenger Weights: In accordance with recent changes to Subchapter T regulations, passengers are assumed to weigh 185 pounds each, centered 39 above the deck. Trim and Stability Report for M.V. Storm Warning 3 R. W. Etsell, P.E.
6 3. Principal Particulars & Capacities Name... STORM WARNING Designer... Weldcraft Marine Builder (Hull)... Weldcraft/Armstrong Marine... Port Angeles, WA, USA Owner:... Kimberlin s Water Taxi... Valdez, AK Year Built Modified Official Number Complement (may be further restricted by lifesaving equip.) passengers + 2 crew Gross Tonnage GT Length overall, hull envelope only... 45'-6" Breadth molded hull... 17'-10" Depth, hull bottom to main deck amidships... 3'-9.5" Main Engines:...(4) Caterpillar 3208, 215hp ea Capacities: Fuel Tanks, 390 g. per side g. total Fresh Water Tank g. Black Water Tank g. Trim and Stability Report for M.V. Storm Warning 4 R. W. Etsell, P.E.
7 4. Trim and Stability Calculations Passenger Service A. Passenger Service Full Load Departure - full fuel, water and passengers % F.S.M. Weight VCG LCG Item Cap. Ft-Tons L.T. Ft. Ft. Lightship (3-4-11) Fuel Tank -Port Fuel Tank -Stbd Fresh water 20g Blk Water 20g Mn Dk Pax Cabin Pax Crew in WH TOTAL Displacement Long Tons VCG, above baseline Feet LCG, from midships Feet Free Surface Moment Ft-Tons Correction to VCG due to FSM Feet Corrected VCG Feet KM, height of transverse metacenter Feet GM, metacentric height Feet Total trim, by the Stern Keel draft at fwd draft marks (X= 24.17')... Baseline draft amidships (Rise) Baseline draft at transom (X= )..... Freeboard to main deck amidship Least freeboard, at bhd Feet (1.2 deg) 1.65 Feet 2.14 Feet 2.56 Feet 1.65 Feet 1.36 Feet STATICAL STABILITY: Heel Angle: (Degrees) Righting Arm: (Feet) RIGHTING ARMS Feet Degrees Trim and Stability Report for M.V. Storm Warning 5 R. W. Etsell, P.E.
8 A. Passenger Full Load Departure (Cont.) INTACT RIGHTING ENERGY: Actual Recommended Minimums Righting Energy, 0-30 degrees: ft-deg ft-deg Righting Energy, 0-40 degrees: ft-deg ft-deg Righting Energy, degrees: 8.50 ft-deg 5.60 ft-deg Max. Righting Arm at heel of 30 deg or greater: 1.24 ft 0.66 ft min. Angle of Maximum Righting Arm: 19 deg 15 Righting Energy, 0-19 degrees: ft-deg ft-deg Metacentric Height, GM: 7.99 ft 0.49 ft Range of Positive GZ: 44 deg 40 deg min. Downflood angle: >60 deg Weather Criteria GM rqd = P A H / W tan(t) L f (.005 exposed.0033 part prot.) P: A (sq. ft) H (ft) 7.08 W (L.T.) 25.1 T (deg) angle to ½ 4.34 GM required 7.76 GM actual 7.99 Margin (ratio) Passenger Heel: GM rqd = N b / K W tan(t) N (Number of Pax) 52 b (1/2 dist can move) 5 K (constant) 24 W (L.T.) 25.1 T (deg) 8.68 Angle of frbd immersion, 14 Max GM required 2.83 GM actual 7.98 Margin (ratio) 2.82 Comment: This condition meets all of the recommended stability criteria. Trim and Stability Report for M.V. Storm Warning 6 R. W. Etsell, P.E.
9 B. Passenger Service Light Arrival Condition full passenger, low fuel & water % F.S.M. Weight VCG LCG Item Cap. Ft-Tons L.T. Ft. Ft. Lightship (3-4-11) Fuel Tank -Port Fuel Tank -Stbd Fresh water 20g Blk Water 20g Mn Dk Pax Cabin Pax Crew in WH TOTAL Displacement Long Tons VCG, above baseline Feet LCG, from midships Feet Free Surface Moment Ft-Tons Correction to VCG due to FSM Feet Corrected VCG Feet KM, height of transverse metacenter Feet GM, metacentric height Feet Total trim, by the Stern Keel draft at fwd draft marks (X= 24.17')... Baseline draft amidships (Rise) Baseline draft at transom (X= )..... Freeboard to main deck amidship Least freeboard, at bhd Feet (1.1 deg) 1.54 Feet 2.00 Feet 2.39 Feet 1.80 Feet 1.56 Feet STATICAL STABILITY: Heel Angle: (Degrees) Righting Arm: (Feet) RIGHTING ARMS Feet Degrees Trim and Stability Report for M.V. Storm Warning 7 R. W. Etsell, P.E.
10 B. Passenger Arrival Condition (Cont.) INTACT RIGHTING ENERGY: Actual Recommended Minimums Righting Energy, 0-30 degrees: ft-deg ft-deg Righting Energy, 0-40 degrees: ft-deg ft-deg Righting Energy, degrees: 7.91 ft-deg 5.60 ft-deg Max. Righting Arm at heel of 30 deg or greater: 1.21 ft 0.66 ft min. Angle of Maximum Righting Arm: 18 deg 15 Righting Energy, 0-18 degrees: ft-deg ft-deg Metacentric Height, GM: 8.57 ft 0.49 ft Range of Positive GZ: 43 deg 40 deg min. Downflood angle: >60 deg Weather Criteria GM rqd = P A H / W tan(t) L f (.005 exposed.0033 part prot.) P: A (sq. ft) H (ft) 7.06 W (L.T.) 22.7 T (deg) angle to ½ 4.96 GM required 7.59 GM actual 8.56 Margin (ratio) Passenger Heel: GM rqd = N b / K W tan(t) N (Number of Pax) 52 b (1/2 dist can move) 5 K (constant) 24 W (L.T.) 22.7 T (deg) 9.92 Angle of frbd immersion, 14 Max GM required 2.73 GM actual 8.56 Margin (ratio) 3.14 Comment: This condition meets all of the recommended stability criteria. Trim and Stability Report for M.V. Storm Warning 8 R. W. Etsell, P.E.
11 5. Trim and Stability Calculations Cargo Service C. Cargo Service Full Load Departure - full fuel, water and max cargo load Note: Maximum cargo load should not extend above the cap railing height (1 m.), so no additional windage is added maximum CVCG, maximum weight = 15,000 lbs (6.70 L.T.) Maximum of 12 passengers this condition. % F.S.M. Weight VCG LCG Item Cap. Ft-Tons L.T. Ft. Ft. Lightship (3-4-11) Fuel Tank -Port Fuel Tank -Stbd Fresh water 20g Blk Water 20g Crew in WH Deck Cargo (15,000 lbs) Cabin Pax TOTAL Displacement Long Tons VCG, above baseline Feet LCG, from midships Feet Free Surface Moment Ft-Tons Correction to VCG due to FSM Feet Corrected VCG Feet KM, height of transverse metacenter Feet GM, metacentric height Feet Total trim, by the Stern Keel draft at fwd draft marks (X= 24.17')... Baseline draft amidships (Rise) Baseline draft at transom (X= )..... Freeboard to main deck amidship Least freeboard, at bhd Feet (0.5 deg) 2.16 Feet 2.37 Feet 2.54 Feet 1.43 Feet 1.35 Feet STATICAL STABILITY: Heel Angle: (Degrees) Righting Arm: (Feet) Feet RIGHTING ARMS Degrees Trim and Stability Report for M.V. Storm Warning 9 R. W. Etsell, P.E.
12 C. Cargo Full Load Departure (Cont.) INTACT RIGHTING ENERGY: Actual Recommended Minimums Righting Energy, 0-30 degrees: ft-deg ft-deg Righting Energy, 0-40 degrees: ft-deg ft-deg Righting Energy, degrees: 7.62 ft-deg 5.60 ft-deg Max. GZ at heel of 30 or greater: 1.14 ft 0.66 ft min. Angle of Maximum Righting Arm: 18 deg 15 Righting Energy, 0-18 degrees: ft-deg ft-deg Metacentric Height, GM: 7.61 ft 0.49 ft Range of Positive GZ: 43 deg 40 deg min. Downflood angle: >60 deg Weather Criteria GM rqd = P A H / W tan(t) L f (.005 exposed.0033 part prot.) P: A (sq. ft) H (ft) 7.11 W (L.T.) T (deg) angle to ½ 4.32 GM required 6.68 GM actual 7.61 Margin (ratio) 1.14 Comment: This condition meets all of the recommended stability criteria. Trim and Stability Report for M.V. Storm Warning 10 R. W. Etsell, P.E.
13 D. Cargo Service Arrival - Minimum fuel, water, and max cargo load Note: Maximum cargo load should not extend above the cap railing height (1 m.), so no additional windage is added maximum CVCG, maximum weight = 15,000 lbs (6.70 L.T.) Maximum of 12 passengers this condition. % F.S.M. Weight VCG LCG Item Cap. Ft-Tons L.T. Ft. Ft. Lightship (3-4-11) Fuel Tank -Port Fuel Tank -Stbd Fresh water 20g Blk Water 20g Crew in WH Deck Cargo (15,000 lbs) Cabin Pax TOTAL Displacement Long Tons VCG, above baseline Feet LCG, from midships Feet Free Surface Moment Ft-Tons Correction to VCG due to FSM Feet Corrected VCG Feet KM, height of transverse metacenter Feet GM, metacentric height Feet Total trim, by the Stern Keel draft at fwd draft marks (X= 24.17')... Baseline draft amidships (Rise) Baseline draft at transom (X= )..... Freeboard to main deck amidship Least freeboard, at bhd Feet (0.3 deg) 2.10 Feet 2.23 Feet 2.35 Feet 1.56 Feet 1.52 Feet STATICAL STABILITY: Heel Angle: (Degrees) Righting Arm: (Feet) RIGHTING ARMS Feet Degrees Trim and Stability Report for M.V. Storm Warning 11 R. W. Etsell, P.E.
14 D. Cargo w/30 PAX Arrival (Cont.) INTACT RIGHTING ENERGY: Actual Recommended Minimums Righting Energy, 0-30 degrees: ft-deg ft-deg Righting Energy, 0-40 degrees: ft-deg ft-deg Righting Energy, degrees: 7.47 ft-deg 5.60 ft-deg Max. GZ at heel of 30 or greater: 1.14 ft 0.66 ft min. Angle of Maximum Righting Arm: 18 deg 15 Righting Energy, 0-18 degrees: ft-deg ft-deg Metacentric Height, GM: 8.02 ft 0.49 ft Range of Positive GZ: 43 deg 40 deg min. Downflood angle: >60 deg Weather Criteria GM rqd = P A H / W tan(t) L f (.005 exposed.0033 part prot.) P: A (sq. ft) H (ft) 7.10 W (L.T.) T (deg) angle to ½ 4.83 GM required 6.59 GM actual 8.02 Margin (ratio) 1.22 Comment: This condition meets all of the recommended stability criteria. Trim and Stability Report for M.V. Storm Warning 12 R. W. Etsell, P.E.
15 E. Cargo Service Max VCG Departure - Full fuel, water and max cargo VCG load. Note: Maximum cargo at CVCG of 3-0 = 8,000 lbs (3.57 L.T.) Additional wind area due to cargo should not exceed 20 square feet, above the caprail. Maximum of 12 passengers this condition. % F.S.M. Weight VCG LCG Item Cap. Ft-Tons L.T. Ft. Ft. Lightship (3-4-11) Fuel Tank -Port Fuel Tank -Stbd Fresh water 20g Blk Water 20g Crew in WH Deck Cargo, 8000# Cabin Pax TOTAL Displacement Long Tons VCG, above baseline Feet LCG, from midships Feet Free Surface Moment Ft-Tons Correction to VCG due to FSM Feet Corrected VCG Feet KM, height of transverse metacenter Feet GM, metacentric height Feet Total trim, by the Stern Keel draft at fwd draft marks (X= 24.17')... Baseline draft amidships (Rise) Baseline draft at transom (X= )..... Freeboard to main deck amidship Least freeboard, at bhd Feet (1.1 deg) 1.72 Feet 2.17 Feet 2.56 Feet 1.62 Feet 1.39 Feet STATICAL STABILITY: Heel Angle: (Degrees) Righting Arm: Meters RIGHTING ARMS Feet Degrees Trim and Stability Report for M.V. Storm Warning 13 R. W. Etsell, P.E.
16 E. Cargo Max VCG Departure (Cont.) INTACT RIGHTING ENERGY: Actual Recommended Minimums Righting Energy, 0-30 degrees: ft-deg ft-deg Righting Energy, 0-40 degrees: ft-deg ft-deg Righting Energy, degrees: 8.29 ft-deg 5.60 ft-deg Max. Righting Arm at heel of 30 deg or greater: 1.22 ft 0.66 ft min. Angle of Maximum Righting Arm: 19 deg 15 Righting Energy, 0-19 degrees: ft-deg ft-deg Metacentric Height, GM: 7.89 ft 0.49 ft Range of Positive GZ: 44 deg 40 deg min. Downflood angle: >60 deg Weather Criteria GM rqd = P A H / W tan(t) L f (.005 exposed.0033 part prot.) P: A (sq. ft) H (ft) 7.09 W (L.T.) T (deg) angle to ½ 4.43 GM required 7.80 GM actual 7.89 Margin 1.01 Comment: This condition meets all of the recommended stability criteria. Trim and Stability Report for M.V. Storm Warning 14 R. W. Etsell, P.E.
17 F. Cargo Service Max VCG Arrival - low fuel, water and max cargo VCG load. Note: Maximum cargo at CVCG of 3-0 = 8,000 lbs (3.57 L.T.) Additional wind area due to cargo should not exceed 20 square feet, above the caprail. Maximum of 12 passengers this condition. % F.S.M. Weight VCG LCG Item Cap. Ft-Tons L.T. Ft. Ft. Lightship (3-4-11) Fuel Tank -Port Fuel Tank -Stbd Fresh water 20g Blk Water 20g Crew in WH Deck Cargo Cabin Pax TOTAL Displacement Long Tons VCG, above baseline Feet LCG, from midships Feet Free Surface Moment Ft-Tons Correction to VCG due to FSM Feet Corrected VCG Feet KM, height of transverse metacenter Feet GM, metacentric height Feet Total trim, by the Stern Keel draft at fwd draft marks (X= 24.17')... Baseline draft amidships (Rise) Baseline draft at transom (X= )..... Freeboard to main deck amidship Least freeboard, at bhd Feet (0.9 deg) 1.62 Feet 2.03 Feet 2.38 Feet 1.76 Feet 1.58 Feet STATICAL STABILITY: Heel Angle: (Degrees) Righting Arm: Meters Feet RIGHTING ARMS Degrees Trim and Stability Report for M.V. Storm Warning 15 R. W. Etsell, P.E.
18 F. Cargo Max VCG Arrival (Cont.) INTACT RIGHTING ENERGY: Actual Recommended Minimums Righting Energy, 0-30 degrees: ft-deg ft-deg Righting Energy, 0-40 degrees: ft-deg ft-deg Righting Energy, degrees: 7.77 ft-deg 5.60 ft-deg Max. Righting Arm at heel of 30 deg or greater: 1.19 ft 0.66 ft min. Angle of Maximum Righting Arm: 19 deg 15 Righting Energy, 0-19 degrees: ft-deg ft-deg Metacentric Height, GM: 8.43 ft 0.49 ft Range of Positive GZ: 43 deg 40 deg min. Downflood angle: >60 deg Weather Criteria GM rqd = P A H / W tan(t) L f (.005 exposed.0033 part prot.) P: A (sq. ft) H (ft) 7.09 W (L.T.) T (deg) angle to ½ 5.01 GM required 7.70 GM actual 8.43 Margin 1.09 Comment: This condition meets all of the recommended stability criteria. Trim and Stability Report for M.V. Storm Warning 16 R. W. Etsell, P.E.
19 6. Intact Stability Standards - Lifting 46 CFR Storm Warning is equipped with a 10,000 ft-lb hydraulic crane for use in cargo loading operations. It is intended for use in harbors and bays under calm conditions. (See Appendix D for the crane manufacturer s specification sheet.) The following safe working loads are consistent with the manufacturer s recommendations, with additional restrictions to ensure compliance with all stability criteria: Reach Partially Protected Waters Maximum Lift Exposed Waters Maximum Lift 3 to lbs 1000 lbs Part 173 of Subchapter S specifies minimum required intact stability standards for vessels engaged in lifting. There are two standards, one for vessels operating in Exposed Waters, and another for vessels operating in Partially Protected or Protected waters. Exposed Waters: The residual righting energy up to the angle of maximum GZ must be greater than or equal to 15 ft-degrees. >> This criterion is satisfied for all lifts allowed by the manufacturer up to a limit of 1000 lbs. Partially Protected and Protected Waters: The residual righting energy up to the angle of maximum GZ must be greater than or equal to 10 ft-degrees. >> This criterion is satisfied for all lifts allowed by the manufacturer up to a limit of 2000 lbs. Trim and Stability Report for M.V. Storm Warning 17 R. W. Etsell, P.E.
20 Example Lifting Condition: Condition C with 2000 pound lift Hook Load = 2000#, VCG, 10.5 Heeling Arm from CL. Heeling Moment = 2000 x 10.5 /2240 = 9.38 ft-lt Heel Arm = 9.38 ft-lt / LT = 0.33 Righting Arms w/hook load: Angle of Max GZ: 18 Residual Righting Energy, A: 12.5 ft-degrees Acceptable for Partially Protected or Protected Waters (min ft-deg.) Trim and Stability Report for M.V. Storm Warning 18 R. W. Etsell, P.E.
21 Appendix A Inclining Test Results Test performed at Port Angeles Boat Haven, on March 4, Vessel As Inclined FBD Depth BWK Draft X inches Feet inches feet 1. Fr 0 P Fr 0 S Fr 3 P Fr 3 S Fr 5 P Fr 5 S Fr 7 P Fr 7 S Fr 10 P Fr 10 S Pts included: 10 Regression Analysis: deg: ft inches,. +aft Slope: Mid draft: Trim: 1.86 Waterline Plot draft x-location Displacement at Time of Test: Volume of displacement cu.ft. Specific gravity of water Weight of vessel at test tons Displacement...( 45,674 pounds) Trim and Stability Report for M.V. Storm Warning 19 R. W. Etsell, P.E.
22 Inclining Test Data - Weight Movements: Note: P+, S- Pendulum 1: inches Locn Pendulum 2: inches Locn Pendulum 3: inches Locn vcg lcg Weight 1: 484 Lbs 57.5 g. plastic drums Nowts Arm Moment Pend Deflect. Tangent Trial Trial Trial Trial Trial Trial Trial Trial Pts included: Regression Analysis: Slope: R^2: Y intercept: Trim and Stability Report for M.V. Storm Warning 20 R. W. Etsell, P.E.
23 Plot of Tangents: Plot of Tangents Moments Tangents Center of Gravity Determination for As-Inclined Condition Slope of Plot of Tangents: by Linear Regression GM = Slope/Displacement: ft Free Surface Moment at Inclining: ft-l.t. Free Surface Correction to GM: ft GM, Corrected for Free Surface: ft. KM: ft. KG = KM - GM: ft. Vertical C.G. KB: ft. LCB: ft. LCG: ft. Long'l C.G. Trim and Stability Report for M.V. Storm Warning 21 R. W. Etsell, P.E.
24 Light Ship Condition Lbs. L.T. VCG LCG As Inclined Deduct: Inclining weights Personnel Fuel (10 g.) F.W. (empty/dry) Weights to deduct: Add: (2) 16PAX Rafts life jackets Weights to Add: Relocate: (None) Weights to Relocate: Light Ship Trim in Light Ship Condition: KM, height of transverse metacenter Feet GM, metacentric height (KM-KG) Feet Total trim, by the Stern Feet (1.4 Degrees) Baseline draft at stem (X= ') Feet Baseline draft amidships (X = 0.00) Feet Baseline draft at stern (X= 20.84') Feet Freeboard to main deck amidships Feet Trim and Stability Report for M.V. Storm Warning 22 R. W. Etsell, P.E.
25 Appendix B Hull Model Hydrostatic calculations are done using a computer hull model derived from the lofting files. The hull is considered to be watertight up to and including the main deck. (Bulwarks and deckhouse are not included in buoyant volume.) (Diagram is for illustration only, and is not to scale.) Ref: Dwg PMBD Table of Offsets Note: All offsets in decimal feet. Sect. 1 Located Ft from M.P. PT Y (TRANSV) Z (VERT) Sect. 2 Located Ft from M.P. PT Y (TRANSV) Z (VERT) Sect. 3 Located Ft from M.P. PT Y (TRANSV) Z (VERT) Sect. 4 Located Ft from M.P. PT Y (TRANSV) Z (VERT) Sect. 5 Located -12 Feet from M.P. PT Y (TRANSV) Z (VERT) Sect. 6 Located -8 Feet from M.P. PT Y (TRANSV) Z (VERT) Sect. 7 Located -4 Feet from M.P. PT Y (TRANSV) Z (VERT) Trim and Stability Report for M.V. Storm Warning 23 R. W. Etsell, P.E.
26 Sect. 8 Located 0 Feet from M.P. PT Y (TRANSV) Z (VERT) Sect. 9 Located Ft from M.P. PT Y (TRANSV) Z (VERT) Sect. 10 Located Ft from M.P. PT Y (TRANSV) Z (VERT) Sect. 11 Located Ft from M.P. PT Y (TRANSV) Z (VERT) Sect. 12 Located 20 Feet from M.P. PT Y (TRANSV) Z (VERT) Trim and Stability Report for M.V. Storm Warning 24 R. W. Etsell, P.E.
27 Appendix C Hydrostatic Properties Trim: Deg. Water: SG ( CF/LT) DRAFT --DISPL- ----VOL-- --LCB-- --LCF-- ---MTI-- ---TPI-- ---KMl-- -KMt DRAFT ---BMl BMt KB-- ---WPA DRAFT - Feet above baseline DISPL - Displacement at specified waterline, long tons 1 Long Ton = 2240 pounds. VOL LCB LCF MT1 TP1 KMl KMt BMl BMt KB WPA - Displaced volume, cubic feet - Longitudinal center of buoyancy, feet aft of M.P. - Longitudinal center of flotation, feet aft of M.P. - Moment to trim one inch, foot-tons - Tons per inch immersion, long tons - Height of longitudinal metacenter, feet above baseline - Height of transverse metacenter, feet above baseline - Vertical distance between center of buoyancy and longitudinal metacenter, feet - Vertical distance between center of buoyancy and transverse metacenter, feet - Height of center of buoyancy, feet above baseline - Waterplane area, square feet Trim and Stability Report for M.V. Storm Warning 25 R. W. Etsell, P.E.
28 Appendix D Crane Specifications Trim and Stability Report for M.V. Storm Warning 26 R. W. Etsell, P.E.
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