Table of Contents INSTRUCTION TO MASTERS SAFETY INFORMATION 3 STABILITY BOOK TO BE KEPT ON VESSEL 3 LOADING CONDITIONS 3 ASPECTS OF LOADING 3 PASSENGER PARTICULARS 3 HYDROSTATIC AND KN VALUES 4 EXCESS TRIMMING BY THE HEAD 4 REDUCTION OF STABILITY DUE TO A STEADY ANGLE OF HEEL (LIST) 4 STABILITY CRITERIA 5 VESSEL PARTICULARS 7 CLASS 1E 8 SMOOTH WATERS OPERATIONS 8 DEPARTURE CONDITION 8 DEADWEIGHT TABLE - DEPARTURE CONDITION 9 SAILING STATE DEPARTURE CONDITION 10 WIND HEELING LEVER DATA 11 PASSENGER HEELING LEVER DATA 12 PASSENGER CROWDING DIAGRAM 15 PASSENGER AREAS & CENTROIDS DIAGRAM 16 WINDAGE AREA DIAGRAM 17 HYDROSTATICS 18 HYDROSTATIC DATA 19 KN DATA 20 KN DATA 21 INCLINING EXPERIMENT REPORT 22 INCLINING EXPERIMENT REPORT 23 HYDROSTATIC DATA AT INCLINING 25 CALCULATION OF HYDROSTATIC PROPERTIES 26 CALCULATION OF INCLINED GM 27 CALCULATION OF KG SOLID 28 CALCULATION OF KG FLUID 28 CALCULATION OF LCG 29 CALCULATION OF TCG 30 CALCULATION OF LIGHTSHIP CONDITION 31 2
INSTRUCTION TO MASTERS SAFETY INFORMATION STABILITY BOOK TO BE KEPT ON VESSEL A copy of this stability book, accepted and endorsed by a Statutory Authority or AMSA Accredited Surveyor, need not be kept on board the vessel at all times. If this book should be lost, or become unusable, a replacement copy must be obtained immediately. As this vessel is classified as an open vessel an approved stability statement must be kept onboard at all times. However the Master of the vessel must be given access to the stability as part of his induction. LOADING CONDITIONS The loading condition shown in this book is typical for the intended service of this vessel. It is emphasized that a separate calculation is necessary for all other conditions of loading. Compliance with the stability criteria does not ensure immunity against capsizing, regardless of the circumstances, nor absolve the Master from his or her responsibility with the safety of the vessel, crew and passengers. The Master must exercise and use good seamanship, having regard to the weather and the navigational zone. The vessel has been examined as 1E, carrying 30 passengers and 2 crew members. No more persons can be carried without further investigation into the stability of the vessel. ASPECTS OF LOADING The following matters must also be taken into account when making up loading conditions: PASSENGER PARTICULARS For the purposes of loading condition calculations the following passenger particulars are to be used: The standard mass of passenger shall be taken as 80 kg within Sheltered and Restricted Offshore Waters Plying Limits The vertical centre of gravity of a standing passenger shall be 1.0 metre above the deck. The vertical centre of gravity of a seated passenger shall be 0.3 metres above the seat. 3
HYDROSTATIC AND KN VALUES Hydrostatic and KN values have been calculated for this vessel at level trim, but if the vessel departs from the trim calculated, the values of the hydrostatic elements and KN values will vary from those at level trim and so overestimate the stability. When operating this vessel, it is essential to keep the vessel close to level trim. EXCESS TRIMMING BY THE HEAD Conditions of loading that give rise to excessive trim by the head, which can lead to difficulties in handling and poor sea keeping are to be avoided REDUCTION OF STABILITY DUE TO A STEADY ANGLE OF HEEL (LIST) A steady angle of heel, however caused, reduces the stability of the vessel to below that calculated for that loading condition. Thus, it is essential to strive to keep the vessel upright at all times. 4
STABILITY CRITERIA The stability criteria for this vessel has been assessed using the NSCV Chapter 7A Intact Stability Requirements. 7.3 CHAPTER 7A CRITERIA ALTERNATIVE SIMPLIFIED CRITERIA OF GENERAL APPLICATION IN OPERATIONAL AREAS C, D AND E 7.3.1 Scope Clause 7.3 provides an alternate means of verifying compliance with the intact stability requirements of this Standard by specifying criteria that allow the application of a practical inclining experiment, without the need to determine KN data, analyse loading conditions and also, in many cases, determine hydrostatic data. NOTE: The procedure for undertaking a practical inclining experiment is specified in Subsection 6C. 7.3.2 Application Clause 7.3 may be applied as an alternative to comprehensive criteria of general application specified in Chapter 5 provided the vessel 1. a) operates within operational areas C, D or E; 2. b) has a measured length less than i) 20 m in operational area C, or ii) 35 m in operational areas D or E; 3. c) carries not more than 49 passengers; 4. d) has not more than one deck above the freeboard deck, exclusive of a wheelhouse; and 5. e) is not engaged in special operations which are required to meet the additional comprehensive criteria specified in Chapter 6, and for which no simplified alternative is provided in Chapter 8. NOTE: There is no benefit to applying simplified intact criteria on vessels that require comprehensive analysis to verify compliance with the damaged stability standards specified in Subsection 6C. 7.3.3 Prerequisites for application of Chapter 7A criteria 7.3.3.1 No sudden changes in waterplane area The waterplane of the vessel over the range of loading conditions shall not significantly reduce in area or moment of inertia as the vessel heels. A vessel shall be deemed to satisfy this requirement if the deck edge does not immerse and the chine does not emerge when the vessel is heeled to angles 2θ R and θ R, see Clause 7.3.5.4. A vessel that is unable to satisfy this requirement may also be deemed to satisfy provided conservative factors of safety are applied, see Clause 7.3.5.5. NOTE: Chapter 7A criteria are based on the assumption that a vessel s stability characteristics in the upright condition reflect the stability characteristics over the relevant range of heel angles. This assumption is only valid provided the shape of the waterplane area does not significantly alter. The criteria are best suited to displacement vessels of round bilge or deep chine hull form. 7.3.3.2 Decks on seagoing vessels that carry passengers Note: This clause is not applicable as the vessel is not a sea going vessel with plying limits of Category E 7.3.4 Criteria A vessel that complies with the criteria listed in Table 27 shall be deemed to satisfy the Chapter 7A criteria. 5
Table 27 Chapter 7A criteria Alternative simplified criteria of general application in operational areas C, D and E Criterion No Limits to application Chapter 7A criterion description 7A.1 All vessels within application clause The vessel at the relevant displacement shall have an initial metacentric height G FM o, not less than the largest of the values calculated from the following formulae: G FM O = F S. M P ΔTanθ R G FM O = F S. M W ΔTanθ R G FM O = F S. M T ΔTanθ R G FM O = the required net initial metacentric height, in metres F S = factor of safety determined in accordance with Clause 7.3.5.5 M P = the persons crowding moment in the upright condition (θ = 0), in tonne-metres M W = the wind heeling moment in the upright condition (θ = 0), in tonne-metres M T = the turning moment in the upright position (θ = 0), in tonne-metres the vessel Note: This is not applicable for this vessel as it is at anchor when passengers are aboard Δ = the vessels s displacement, determined in accordance with Clause 7.3.5.2, in tonnes θ R = an angle representing the maximum reliable angle of heel, calculated from the geometry of the vessel in accordance with Clause 7.3.5.4, in degrees Note: This angle is 3.12, which is the angle to half the freeboard. The chine emergence angle is calculated to be 7.62 6
VESSEL PARTICULARS Vessel s Name: Tarzan Boat Length Overall (LOA): 10.366 metres Length Between Perpendiculars (LBP): 10.366 metres Beam Moulded (B M ): 3.658 metres Depth Moulded (D M ): 0.445 metres Draft: 0.245 metres Position of Baseline: Lowest point of pontoon Vertical Datum for Aft Draft marks: Baseline Longitudinal Datum: AP Class: 1E 7
CLASS 1E SMOOTH WATERS OPERATIONS DEPARTURE CONDITION 8
DEADWEIGHT TABLE - DEPARTURE CONDITION Vessel...: Tarzan Boat Condition.: Loaded 38 Passengers & 2 Crew on All Decks State...: Hull without added appendages Water SG..: 1.025 Longitudinal dimensions about AP (-ve aft, +ve forward) Vertical dimensions about Baseline (+ve above, -ve below) Transverse dimensions about centreline (+ve Port, -ve Stbd) Deadweight Item Weight LCG Longitudinal TCG Transverse VCG Vertical Free Surface Moment Moment Moment Moment tonnes metres t.m metres t.m metres t.m t.m 1 People on Top Deck (5) 0.40 4.787 1.915 0.124 0.05 4.384 1.754-2 Crew (1) 0.08 4.787 0.383 0.00 0.00 4.384 0.351-3 Passengers on Fwd. Board (3) 0.24 7.792 1.87 1.331 0.319 2.77 0.665-4 Passengers on Aft Board (3) 0.24 0.552 0.132-1.298-0.312 3.182 0.764-5 Passengers on Main Deck (27) 2.16 4.952 10.696 0.055 0.119 1.485 3.208-6 Crew (1) 0.08 4.952 0.396 0.055 0.004 1.485 0.119 - DEADWEIGHT TOTAL 3.2 4.81 15.393 0.056 0.181 2.143 6.859 0 LIGHTSHIP 5.533 4.913 27.184 0.008 0.044 1.909 10.563 - DISPLACEMENT 8.733 4.875 42.576 0.026 0.225 1.995 17.422 0 Free Surface 0.000 Correction VCG fluid 1.995 9
SAILING STATE DEPARTURE CONDITION Vessel...: Tarzan Boat Condition.: Loaded 38 Passengers & 2 Crew on All Decks State...: Hull without added appendages Water SG..: 1.025 Longitudinal dimensions about AP (-ve aft, +ve forward) Vertical dimensions about Baseline (+ve above, -ve below) Transverse dimensions about centreline (+ve Port, -ve Stbd) DRAFT SUMMARY (DIMENSIONS IN METRES) Mean Max. Port Starboard Draft forward (about Baseline at FP) - 0.228 0.228 Draft midships (about Baseline) - 0.237 0.237 Draft aft (about Baseline at AP) - 0.245 0.245 FREEBOARD SUMMARY (DIMENSIONS IN METRES) Mean Min. Port Starboard Freeboard to Deck at FP 0.076 0.217 0.217 Freeboard to Deck at Midships 0.076 0.208 0.208 Freeboard to Deck at AP 0.076 0.200 0.200 Heel angle Trim Draft at KN KGxSIN(Heel) Righting GZ fluid midships Moment degrees metres on LBP metres metres metres tonne.metres metres 0 0.018 by stern 0.237 0.027 0 0.235 0.027 2 0.031 '' 0.234 0.193 0.07 1.075 0.123 4 0.047 '' 0.231 0.358 0.139 1.915 0.219 6 0.066 '' 0.228 0.525 0.209 2.76 0.316 8 0.088 '' 0.226 0.673 0.278 3.451 0.395 10 0.107 '' 0.225 0.751 0.346 3.536 0.405 12 0.128 '' 0.224 0.794 0.415 3.314 0.379 14 0.151 '' 0.222 0.82 0.483 2.948 0.338 16 0.175 '' 0.22 0.837 0.55 2.504 0.287 18 0.199 '' 0.218 0.847 0.616 2.013 0.23 20 0.223 '' 0.216 0.853 0.682 1.49 0.171 22 0.245 '' 0.213 0.856 0.747 0.946 0.108 24 0.261 '' 0.212 0.857 0.811 0.401 0.046 26 0.283 '' 0.209 0.855 0.875-0.169-0.019 28 0.304 '' 0.206 0.851 0.937-0.745-0.085 30 0.325 '' 0.202 0.846 0.997-1.325-0.152 32 0.345 '' 0.199 0.839 1.057-1.908-0.218 34 0.365 '' 0.195 0.83 1.116-2.491-0.285 36 0.384 '' 0.191 0.821 1.173-3.073-0.352 STABILITY SUMMARY Minimum Actual Angle of immersion of Chine at FP (degrees) - Area under GZ curve between 0.00 and 0.00 degrees (metre.degrees) 3.15 0 Area under GZ curve between 0.00 and 0.00 degrees (metre.degrees) 5.16 0 Area under GZ curve between 30.00 and 0.00 degrees (metre.degrees) 1.72 0 Maximum GZ (metres) 0.2 0.406 Angle of heel at which maximum GZ occurs (degrees) 30 9.555 Positive GZ heel range (degrees) 0 GM solid (metres) (upright) 5.611 Free Surface correction (metres) 0 GM fluid (metres) (upright) 0.15 5.611 10
WIND HEELING LEVER DATA Vessel...: Tarzan Boat Condition.: Loaded 38 Passengers & 2 Crew on All Decks State...: Hull without added appendages Heel lever: Wind Heeling Lever Water SG..: 1.025 Expression: Lever = ((300*19.965*2.049)/(1000*9.81*DSPT))*COS(HEEL) Heel angle Trim about Base Line Heeling moment Heeling lever degrees metres on LBP tonne.metres metres 0 0.018 by stern 1.251 0.143 2 0.031 '' 1.25 0.143 4 0.047 '' 1.248 0.143 6 0.066 '' 1.244 0.142 8 0.088 '' 1.239 0.142 10 0.107 '' 1.232 0.141 12 0.128 '' 1.224 0.14 14 0.151 '' 1.214 0.139 16 0.175 '' 1.203 0.138 18 0.199 '' 1.19 0.136 20 0.223 '' 1.176 0.135 22 0.245 '' 1.16 0.133 24 0.261 '' 1.143 0.131 26 0.283 '' 1.124 0.129 28 0.304 '' 1.105 0.126 30 0.325 '' 1.083 0.124 32 0.345 '' 1.061 0.121 34 0.365 '' 1.037 0.119 36 0.384 '' 1.012 0.116 HEELING LEVER AND RIGHTING LEVER DATA Maximum Actual Angle of heel at first curve intersection (degrees) 10 2.418 Heeling lever at first curve intersection (metres) - 0.143 Angle of heel at second curve intersection (degrees) - 21.192 Heeling lever at second curve intersection (metres) - 0.134 Area under heeling lever to first curve intersection (metre.degrees) Area under heeling lever to flood angle (0.0 degrees) (metre.degrees) - 0.346-0 Area under GZ curve to first curve intersection (metre.degrees) Area under GZ curve to flood angle (0.0 degrees) (metre.degrees) Area between curves from 0 deg. heel to first curve intersection (metre.degrees) Area between curves in range 2.4 degrees to 0.0 degrees (metre.degrees) Minimum Actual - 0.206-0 - 0.141-0.141 11
PASSENGER HEELING LEVER DATA Vessel...: Tarzan Boat Condition.: Loaded 38 Passengers & 2 Crew on All Decks State...: Hull without added appendages Heel lever: Passenger Heeling Lever Water SG..: 1.025 Expression: Lever = ((38*80*0.860)/(1000*DSPT))*COS(HEEL) Heel Angle Trim about Base Line Heeling Moment Heeling Lever degrees metres on LBP tonne.metres metres 0 0.018 by stern 2.614 0.299 2 0.031 '' 2.612 0.299 4 0.047 '' 2.608 0.299 6 0.066 '' 2.600 0.298 8 0.088 '' 2.589 0.295 10 0.107 '' 2.574 0.295 12 0.128 '' 2.557 0.293 14 0.151 '' 2.536 0.290 16 0.175 '' 2.513 0.288 18 0.199 '' 2.486 0.285 20 0.223 '' 2.456 0.281 22 0.245 '' 2.424 0.278 24 0.261 '' 2.388 0.273 26 0.283 '' 2.349 0.269 28 0.304 '' 2.308 0.264 30 0.325 '' 2.264 0.269 32 0.345 '' 2.217 0.254 34 0.365 '' 2.167 0.248 36 0.384 '' 2.115 0.242 HEELING LEVER AND RIGHTING LEVER DATA Maximum Actual Angle of heel at first curve intersection (degrees) 10 5.852 Heeling lever at first curve intersection (metres) - 0.309 Angle of heel at second curve intersection (degrees) - 15.534 Heeling lever at second curve intersection (metres) - 0.299 Area under heeling lever to first curve intersection (metre.degrees) - 1.814 Area under heeling lever to flood angle (0.0 degrees) (metre.degrees) - 0.000 HEELING LEVER AND RIGHTING LEVER DATA (CONTINUED) Minimum Actual Area under GZ curve to first curve intersection (metre.degrees) - 0.981 Area under GZ curve to flood angle (0.0 degrees) (metre.degrees) - 0.000 Area between curves from 0 deg. heel to first curve intersection (metre.degrees) - 0.833 Area between curves in range 5.9 degrees to 0.0 degrees (metre.degrees) - 0.833 12
13
RESULTS G F M O = F S. M P ΔTanθ R = 1.0 x 2.614 8.733 x Tan 3.12 = 5.491 metres which is less than 5.611 metres G F M O = F S. M W ΔTanθ R = 1.0 x 1.251 8.733 x Tan 3.12 = 2.628 metres which is less than 5.611 metres G F M O = F S. M T ΔTanθ R This requirement is not applicable as the vessel is at anchor when passengers are embarked Note: θ R is the angle to half the freeboard and is 3.12. The chine emergence angle has been calculated to be 7.62, therefore 3.12. has been used above. CONCLUSION The vessel satisfies the NSCV stability requirements when loaded with thirty eight (38) passengers and two (2) crew. A maximum of 5 passengers are permitted on the upper platform and a maximum of three (3) persons only are permitted on the intermediate decks leading to the trampolines or rope swing. 14
PASSENGER CROWDING DIAGRAM 15
PASSENGER AREAS & CENTROIDS DIAGRAM 16
WINDAGE AREA DIAGRAM 17
HYDROSTATICS 18
HYDROSTATIC DATA Vessel name: Tarzan Boat Longitudinal datum: AP (-ve aft, ve forward of datum) Vertical datum: Baseline Drafts: +ve above, -ve below Baseline Water SG: 1.025 LBP: 10.366 metres Trim on LBP: Level relative to Base Line Draft Displacement LCB VCB WPA LCF MCT 1cm KML KMT TPC WSA metres Mld-tonnes metres metres metres^2 metres t.metres metres metres tonne/cm metres^2 0.05 1.844 4.932 0.025 35.972 4.932 0.292 164.222 22.179 0.369 37.344 0.06 2.212 4.932 0.03 35.972 4.932 0.292 139.533 18.852 0.369 37.619 0.07 2.581 4.932 0.035 35.972 4.932 0.292 119.902 16.208 0.369 37.893 0.08 2.95 4.932 0.04 35.972 4.932 0.292 104.66 14.156 0.369 38.168 0.09 3.318 4.932 0.045 35.972 4.932 0.292 92.727 12.55 0.369 38.442 0.1 3.687 4.932 0.05 35.972 4.932 0.292 83.215 11.271 0.369 38.717 0.11 4.056 4.932 0.055 35.972 4.932 0.292 75.48 10.231 0.369 38.991 0.12 4.425 4.932 0.06 35.972 4.932 0.292 69.072 9.371 0.369 39.266 0.13 4.793 4.932 0.065 35.972 4.932 0.292 63.679 8.648 0.369 39.54 0.14 5.162 4.932 0.07 35.972 4.932 0.292 59.075 8.031 0.369 39.815 0.15 5.531 4.932 0.075 35.972 4.932 0.292 55.098 7.499 0.369 40.089 0.16 5.899 4.932 0.08 35.972 4.932 0.292 51.629 7.035 0.369 40.364 0.17 6.268 4.932 0.085 35.972 4.932 0.292 48.574 6.627 0.369 40.638 0.18 6.637 4.932 0.09 35.972 4.932 0.292 45.864 6.266 0.369 40.913 0.19 7.006 4.932 0.095 35.972 4.932 0.292 43.443 5.944 0.369 41.187 0.2 7.374 4.932 0.1 35.972 4.932 0.292 41.267 5.654 0.369 41.462 0.21 7.743 4.932 0.105 35.972 4.932 0.292 39.3 5.393 0.369 41.736 0.22 8.112 4.932 0.11 35.972 4.932 0.292 37.515 5.157 0.369 42.011 0.23 8.48 4.932 0.115 35.972 4.932 0.292 35.886 4.941 0.369 42.285 0.24 8.849 4.932 0.12 35.972 4.932 0.292 34.394 4.744 0.369 42.56 0.25 9.218 4.932 0.125 35.972 4.932 0.292 33.023 4.564 0.369 42.834 0.26 9.587 4.932 0.13 35.972 4.932 0.292 31.758 4.397 0.369 43.109 0.27 9.955 4.932 0.135 35.972 4.932 0.292 30.588 4.244 0.369 43.383 0.28 10.324 4.932 0.14 35.972 4.932 0.292 29.502 4.102 0.369 43.658 0.29 10.693 4.932 0.145 35.972 4.932 0.292 28.492 3.97 0.369 43.932 0.3 11.061 4.932 0.15 35.972 4.932 0.292 27.55 3.847 0.369 44.207 0.31 11.43 4.932 0.155 35.972 4.932 0.292 26.669 3.732 0.369 44.481 0.32 11.799 4.932 0.16 35.972 4.932 0.292 25.843 3.625 0.369 44.756 0.33 12.167 4.932 0.165 35.972 4.932 0.292 25.068 3.525 0.369 45.03 0.34 12.536 4.932 0.17 35.972 4.932 0.292 24.339 3.431 0.369 45.305 0.35 12.905 4.932 0.175 35.972 4.932 0.292 23.653 3.343 0.369 45.579 0.36 13.274 4.932 0.18 35.972 4.932 0.292 23.004 3.26 0.369 45.854 0.37 13.642 4.932 0.185 35.972 4.932 0.292 22.391 3.181 0.369 46.128 0.38 14.011 4.932 0.19 35.972 4.932 0.292 21.811 3.107 0.369 46.403 0.39 14.38 4.932 0.195 35.972 4.932 0.292 21.261 3.037 0.369 46.677 0.4 14.748 4.932 0.2 35.972 4.932 0.292 20.739 2.971 0.369 46.952 19
KN DATA 20
KN DATA Vessel name: Tarzan Boat Longitudinal datum: AP (-ve aft, ve forward of datum) Vertical datum: Baseline Drafts: +ve above, -ve below Baseline Water SG: 1.025 LBP: 10.366 metres Trim on LBP: Level relative to Base Line Displacement Draft Righting levers (KN) Ext. tonnes metres metres 2 4 6 8 12 16 20 24 28 32 3 0.081 0.529 0.887 1.055 1.157 1.278 1.343 1.378 1.386 1.374 1.348 1.311 3.2 0.087 0.498 0.857 1.031 1.136 1.262 1.33 1.365 1.372 1.359 1.333 1.296 3.4 0.092 0.47 0.829 1.007 1.115 1.245 1.317 1.352 1.357 1.343 1.317 1.281 3.6 0.098 0.446 0.801 0.985 1.096 1.229 1.304 1.338 1.341 1.328 1.302 1.266 3.8 0.103 0.428 0.774 0.963 1.076 1.214 1.29 1.322 1.326 1.312 1.286 1.251 4 0.108 0.409 0.747 0.941 1.058 1.199 1.277 1.307 1.309 1.295 1.27 1.235 4.2 0.114 0.392 0.721 0.921 1.04 1.184 1.263 1.291 1.293 1.279 1.254 1.219 4.4 0.119 0.376 0.696 0.9 1.022 1.17 1.248 1.274 1.276 1.262 1.237 1.203 4.6 0.125 0.364 0.67 0.88 1.005 1.156 1.232 1.258 1.259 1.245 1.221 1.187 4.8 0.13 0.351 0.647 0.861 0.989 1.143 1.216 1.241 1.242 1.228 1.204 1.171 5 0.136 0.339 0.625 0.842 0.972 1.13 1.2 1.224 1.224 1.211 1.187 1.155 5.2 0.141 0.328 0.604 0.824 0.956 1.116 1.184 1.206 1.207 1.194 1.17 1.139 5.4 0.146 0.318 0.583 0.805 0.941 1.101 1.167 1.189 1.189 1.176 1.153 1.122 5.6 0.152 0.309 0.564 0.787 0.926 1.087 1.15 1.171 1.171 1.159 1.136 1.106 5.8 0.157 0.3 0.546 0.77 0.91 1.072 1.133 1.153 1.153 1.141 1.119 1.09 6 0.163 0.293 0.53 0.752 0.896 1.056 1.115 1.135 1.135 1.123 1.102 1.073 6.2 0.168 0.285 0.516 0.735 0.881 1.04 1.097 1.117 1.117 1.105 1.084 1.056 6.4 0.174 0.278 0.502 0.719 0.867 1.024 1.08 1.098 1.099 1.087 1.067 1.04 6.6 0.179 0.271 0.488 0.702 0.853 1.008 1.062 1.08 1.08 1.069 1.05 1.023 6.8 0.184 0.265 0.476 0.686 0.839 0.992 1.044 1.062 1.062 1.051 1.032 1.006 7 0.19 0.259 0.464 0.67 0.825 0.975 1.026 1.043 1.044 1.033 1.015 0.99 7.2 0.195 0.254 0.454 0.653 0.813 0.958 1.008 1.025 1.025 1.015 0.997 0.973 7.4 0.201 0.249 0.443 0.638 0.799 0.941 0.989 1.006 1.007 0.997 0.98 0.956 7.6 0.206 0.244 0.433 0.624 0.785 0.924 0.971 0.987 0.988 0.979 0.962 0.94 7.8 0.212 0.239 0.424 0.61 0.771 0.906 0.952 0.968 0.97 0.961 0.945 0.923 8 0.217 0.235 0.415 0.596 0.756 0.889 0.934 0.95 0.951 0.943 0.928 0.906 8.2 0.222 0.23 0.407 0.584 0.742 0.871 0.915 0.931 0.932 0.924 0.91 0.889 8.4 0.228 0.227 0.399 0.572 0.727 0.853 0.896 0.912 0.914 0.906 0.893 0.872 8.6 0.233 0.223 0.391 0.56 0.712 0.835 0.878 0.893 0.895 0.888 0.875 0.855 8.8 0.239 0.219 0.384 0.549 0.696 0.817 0.859 0.874 0.876 0.87 0.858 0.839 9 0.244 0.216 0.377 0.54 0.68 0.799 0.84 0.855 0.858 0.852 0.84 0.822 21
INCLINING EXPERIMENT REPORT 22
INCLINING EXPERIMENT REPORT Name of vessel: Clients name: Experiment carried out by: Surveyor attending: Tarzan Boat Bruce Conroy Gavin Clarke Steven Mitchell Date: 14 th March, 2017 Location: State of weather: Mooring arrangements: Bilges: Equipment complete: Willoughby Bay, Middle Harbour Overcast with showers in the area, Breeze on bow(<5kn) Slack anchor line off mooring buoy Dry Yes Specific gravity of water: 1,023.0 kg/m 3 Number of persons aboard: 3 persons (303 kg) Steve Mitchell 134 (kg) Standing at 5.700 mm forward of AP Gavin Clarke 93 (kg) Kneeling at 6.200 mm forward of AP Bruce Conroy 76 (kg) Standing at 3.350 mm forward of AP TOTAL 303 (kg) 5.264 mm forward of AP Length of pendulum: Location of pendulum: 1,968 mm 6.370 m forward of AP 23
Drafts: Observed Freeboards (in mm) Note: No draft marks on vessel Port Starboard Position Aft Freeboards 284 284 At Transom Midships Freeboard 284 284 Approximately Midships Forward Freeboards 284 284 At Bow Drafts Based on Measured Freeboards (in mm) Port Starboard Position Aft Perpendicular 170 170 At AP Fwd. Perpendicular 170 170 At FP Trim is 0.00 m over the LBP. Location of weights during experiment: Item Weight (t) LCG (m) TCG (m) VCG (m) A 0.100 2.450 1.729 0.595 B 0.100 6.71 1.729 0.595 C 0.100 3.06-1.729 0.595 D 0.100 7.26-1.729 0.595 Person A 0.134 5.70 0.000 1.445 Person B 0.093 6.20-0.40 0.845 Person C 0.076 3.35 0.00 1.445 Inclining Equipment 0.020 6.37-0.40 0.545 Item Weight (t) LCG (m) TCG (m) VCG (m) TOTAL Nil 24
HYDROSTATIC DATA AT INCLINING Vessel s name: Tarzan Boat Longitudinal datum: AP (-ve aft, +ve forward of datum) Vertical datum: Baseline Drafts: +ve above, -ve below baseline Water SG: 1.023 tonnes/metre 3 LBP: 10.366 metres Trim: 0.0 metres by the stern relative to Base Line Draft Displacement LCB VCB WPA LCF MCT 1cm KML KMT TPC WSA metres Mld-tonnes metres metres metres 2 metres t.metres metres metres tonne/cm metres 2 0.170 6.256 4.932 0.085 35.972 4.932 0.291 48.378 6.601 0.368 40.638 25
CALCULATION OF HYDROSTATIC PROPERTIES Superimposing the inclined waterline from the inclining experiment carried out on 14th March, 2017 on the vessel s Lines Plan the following values are obtained Freeboards: = 0.284 metres in bow, stern and midships (P & S) Drafts: = 0.170 metres in bow, stern and midships (P & S) Trim between draft measurements: Length between draft measurements: = 0.000 metres by the stern = 10.366 metres Mean draft between perpendiculars: = 0.170 + 0.170 2 = 0.170 metres Trim between the perpendiculars: Length between perpendiculars: Displacement at draft measurement: Displacement at inclining: KM at inclining: = 0.000 metres by the stern = 10.366 metres = 6.256 tonnes = 6.256 tonnes = 6.601 metres 26
CALCULATION OF INCLINED GM Mass (tonnes) Distance Moved (metres) Heeling Moment (t.m) Pendulum Reading (mm) Pendulum Deflection (metres) W x d m % Difference 0 0 0 0 0 0 0.000 0.00 1 0.100 3.520 0.352 23.5 0.0235 15.644 4.11 2 0.310 2.370 0.715 72.5 0.0490 14.302-4.82 3 0.410 2.568 1.067 0.0-0.0725 14.718-2.05 4 0.100 3.520 0.352 23.0-0.0230 15.304 1.85 5 0.310 2.370 0.715 72.0-0.0490 15.055 0.19 6 0.410 2.568 1.067 0.0-0.072 15.136 0.73 Total 90.160 Average 15.027 Displacement at inclining: Pendulum length: Average GM FLUID: 6.256 tonnes 1.968 metres 4.727 metres Maximum % difference: 4.82 % Minimum angle of heel: 2.09 degrees 27
CALCULATION OF KG SOLID See calculation of GM at inclining GM FLUID = 4.727 metres KG SOLID = KM GM FLUID = 6.601 4.727 = 1.874 metres CALCULATION OF KG FLUID Tank No tanks fitted GG 1 FSM 0.000 tonne.metres = 0.000 metres KG FLUID = KG SOLID + GG 1 = 1.874 + 0.000 = 1.874 metres 28
CALCULATION OF LCG From level trim hydrostatics at draft measurements: Displacement Trim LCB VCB BG FLUID = 6.256 tonnes = 0.000 metres by the stern = 4.932 metres forward of AP = 0.085 metres = KG FLUID VCB = 1.874 0.085 = 1.789 metres LCB CORRECTION = BG FLUID x Trim LBP = 1.789 x 0.000 10.366 = 0.000 metres LCG at measurement = LCB MEASUREMENT + LCB CORRECTION = 4.932 + 0.000 = 4.932 metres forward of AP 29
CALCULATION OF TCG TCG at inclining = 0.0 metres 30
CALCULATION OF LIGHTSHIP CONDITION Vessel...: Tarzan Boat State...: Hull without added appendages Longitudinal dimensions about AP (-ve aft, +ve forward) Vertical dimensions about Baseline (+ve above, -ve below) Transverse dimensions about centreline (+ve Port, -ve Stbd) Item Weight LCG Longitudinal Moment TCG Transverse Moment VCG Vertical Moment Free Surface Moment tonnes metres t.m metres t.m metres t.m t.m 1 As inclined 6.256 4.932 30.855 0 0 1.789 11.192-2 Less 3 Weight Group A -0.1 2.45-0.245 1.729-0.173 0.595-0.06-4 Weight Group B -0.1 6.71-0.671 1.729-0.173 0.595-0.06-5 Weight Group C -0.1 3.06-0.306-1.729 0.173 0.595-0.06-6 Weight Group D -0.1 7.26-0.726-1.729 0.173 0.595-0.06-7 Person A -0.134 5.7-0.764 0 0 1.445-0.194-8 Person B -0.093 6.2-0.577-0.4 0.037 0.845-0.079-9 Person C -0.076 3.35-0.255 0 0 1.445-0.11-10 Inclining Gear -0.02 6.37-0.127-0.4 0.008 0.545-0.011 - TOTAL 5.533 4.913 27.184 0.008 0.045 1.909 10.561 0 31