CLASS 1E 8 SMOOTH WATERS OPERATIONS 8

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2 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

3 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

4 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

5 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 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 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 Prerequisites for application of Chapter 7A criteria 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 A vessel that is unable to satisfy this requirement may also be deemed to satisfy provided conservative factors of safety are applied, see Clause 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 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 Criteria A vessel that complies with the criteria listed in Table 27 shall be deemed to satisfy the Chapter 7A criteria. 5

6 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 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 , in tonnes θ R = an angle representing the maximum reliable angle of heel, calculated from the geometry of the vessel in accordance with Clause , 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 VESSEL PARTICULARS Vessel s Name: Tarzan Boat Length Overall (LOA): metres Length Between Perpendiculars (LBP): metres Beam Moulded (B M ): metres Depth Moulded (D M ): metres Draft: metres Position of Baseline: Lowest point of pontoon Vertical Datum for Aft Draft marks: Baseline Longitudinal Datum: AP Class: 1E 7

8 CLASS 1E SMOOTH WATERS OPERATIONS DEPARTURE CONDITION 8

9 DEADWEIGHT TABLE - DEPARTURE CONDITION Vessel...: Tarzan Boat Condition.: Loaded 38 Passengers & 2 Crew on All Decks State...: Hull without added appendages Water SG..: 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) Crew (1) Passengers on Fwd. Board (3) Passengers on Aft Board (3) Passengers on Main Deck (27) Crew (1) DEADWEIGHT TOTAL LIGHTSHIP DISPLACEMENT Free Surface Correction VCG fluid

10 SAILING STATE DEPARTURE CONDITION Vessel...: Tarzan Boat Condition.: Loaded 38 Passengers & 2 Crew on All Decks State...: Hull without added appendages Water SG..: 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) Draft midships (about Baseline) Draft aft (about Baseline at AP) FREEBOARD SUMMARY (DIMENSIONS IN METRES) Mean Min. Port Starboard Freeboard to Deck at FP Freeboard to Deck at Midships Freeboard to Deck at AP Heel angle Trim Draft at KN KGxSIN(Heel) Righting GZ fluid midships Moment degrees metres on LBP metres metres metres tonne.metres metres by stern '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' 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) Area under GZ curve between 0.00 and 0.00 degrees (metre.degrees) Area under GZ curve between and 0.00 degrees (metre.degrees) Maximum GZ (metres) Angle of heel at which maximum GZ occurs (degrees) Positive GZ heel range (degrees) 0 GM solid (metres) (upright) Free Surface correction (metres) 0 GM fluid (metres) (upright)

11 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..: 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 by stern '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' HEELING LEVER AND RIGHTING LEVER DATA Maximum Actual Angle of heel at first curve intersection (degrees) Heeling lever at first curve intersection (metres) Angle of heel at second curve intersection (degrees) Heeling lever at second curve intersection (metres) Area under heeling lever to first curve intersection (metre.degrees) Area under heeling lever to flood angle (0.0 degrees) (metre.degrees) 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

12 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..: 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 by stern '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' HEELING LEVER AND RIGHTING LEVER DATA Maximum Actual Angle of heel at first curve intersection (degrees) Heeling lever at first curve intersection (metres) Angle of heel at second curve intersection (degrees) Heeling lever at second curve intersection (metres) Area under heeling lever to first curve intersection (metre.degrees) Area under heeling lever to flood angle (0.0 degrees) (metre.degrees) HEELING LEVER AND RIGHTING LEVER DATA (CONTINUED) Minimum Actual 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 5.9 degrees to 0.0 degrees (metre.degrees)

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14 RESULTS G F M O = F S. M P ΔTanθ R = 1.0 x x Tan 3.12 = metres which is less than metres G F M O = F S. M W ΔTanθ R = 1.0 x x Tan 3.12 = metres which is less than 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 The chine emergence angle has been calculated to be 7.62, therefore 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

15 PASSENGER CROWDING DIAGRAM 15

16 PASSENGER AREAS & CENTROIDS DIAGRAM 16

17 WINDAGE AREA DIAGRAM 17

18 HYDROSTATICS 18

19 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: LBP: 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^

20 KN DATA 20

21 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: LBP: metres Trim on LBP: Level relative to Base Line Displacement Draft Righting levers (KN) Ext. tonnes metres metres

22 INCLINING EXPERIMENT REPORT 22

23 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 mm forward of AP Gavin Clarke 93 (kg) Kneeling at mm forward of AP Bruce Conroy 76 (kg) Standing at mm forward of AP TOTAL 303 (kg) mm forward of AP Length of pendulum: Location of pendulum: 1,968 mm m forward of AP 23

24 Drafts: Observed Freeboards (in mm) Note: No draft marks on vessel Port Starboard Position Aft Freeboards At Transom Midships Freeboard Approximately Midships Forward Freeboards At Bow Drafts Based on Measured Freeboards (in mm) Port Starboard Position Aft Perpendicular At AP Fwd. Perpendicular 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 B C D Person A Person B Person C Inclining Equipment Item Weight (t) LCG (m) TCG (m) VCG (m) TOTAL Nil 24

25 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: tonnes/metre 3 LBP: 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

26 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: = metres in bow, stern and midships (P & S) Drafts: = metres in bow, stern and midships (P & S) Trim between draft measurements: Length between draft measurements: = metres by the stern = metres Mean draft between perpendiculars: = = metres Trim between the perpendiculars: Length between perpendiculars: Displacement at draft measurement: Displacement at inclining: KM at inclining: = metres by the stern = metres = tonnes = tonnes = metres 26

27 CALCULATION OF INCLINED GM Mass (tonnes) Distance Moved (metres) Heeling Moment (t.m) Pendulum Reading (mm) Pendulum Deflection (metres) W x d m % Difference Total Average Displacement at inclining: Pendulum length: Average GM FLUID: tonnes metres metres Maximum % difference: 4.82 % Minimum angle of heel: 2.09 degrees 27

28 CALCULATION OF KG SOLID See calculation of GM at inclining GM FLUID = metres KG SOLID = KM GM FLUID = = metres CALCULATION OF KG FLUID Tank No tanks fitted GG 1 FSM tonne.metres = metres KG FLUID = KG SOLID + GG 1 = = metres 28

29 CALCULATION OF LCG From level trim hydrostatics at draft measurements: Displacement Trim LCB VCB BG FLUID = tonnes = metres by the stern = metres forward of AP = metres = KG FLUID VCB = = metres LCB CORRECTION = BG FLUID x Trim LBP = x = metres LCG at measurement = LCB MEASUREMENT + LCB CORRECTION = = metres forward of AP 29

30 CALCULATION OF TCG TCG at inclining = 0.0 metres 30

31 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 Less 3 Weight Group A Weight Group B Weight Group C Weight Group D Person A Person B Person C Inclining Gear TOTAL