Report on inclining test and light ship survey

Transcription

1 Report 79 Report on inclining test and light ship survey Nae of ship (Yard no. and yard): Signal letters: Carried out, place and date: Suary of results: Light ship weight: tonnes Vertical centre of gravity, VCG: above baseline Longitudinal centre of gravity, LCG: fro Metacentric height, GM T : Lightship draught aidships: fro BL Tri by ste/stern Person responsible (nae and copany): Signature Stap Approved, date Tie used hours Surveyor KS-0179E Rev.:

2 Norwegian Maritie Authority Report GENERAL INFORMATION Owners (nae and address): If existing ship, state reason for new inclining test: Report date: Last revision of the report, date: Test coenced (hrs.) Finished (hrs.) Weather conditions in general: Sea state: Wind: Current: Specific gravity of seawater: t/ 3 easured? Yes No Mooring arrangeent: Attending surveyor: NMD Station in: 2. SHIP PARTICULARS Length over all: Length between perpendiculars (LBP): Breadth oulded 1 aidships: Depth oulded aidships (D): Ship without shell plating: Is deck thickness included in D? Yes No () Design tri (rake of keel) over LBP: Height / thickness of bar keel / keel plate: 3. OTHER INFORMATION Sister ships if any (Y/No, nae, signal letters): Last hull extension or otherodification (year): Peranent ballast during test: Peranent ballast taken on board after the test: () () () () () () 1 For vessels without shell plating (wooden hulls, GRP etc.) easured to outside hull 2

3 Norwegian Maritie Authority Report DRAUGHT READINGS B.L. B.L. A.P. LBP Fig. 1 F.P. Please indicate the following inforation on the sketches: 1. Base line and longitudinal reference point used in the hydrostatic particulars 2. Location of draught arks for and aft (Fig. 1) 3. Draught readings at arks 4. Freeboard readings, starboard and port side (Fig.2 or fig. 3) 5. Longitudinal, transverse and vertical location of other reference points used, if any 6. Readings at other reference points, if any NOTE: If the ship has tri during the test, care ust be taken to ensure that the readings are correct according to how draught is defined in the hydrostatic data used. (Perpendicular to the base line or perpendicular to the waterline.) 3

4 Norwegian Maritie Authority Report 79 td =.. f =.. Port Starboard f =.. d =.. Baseline K d =...tb =.. hk =. Fig. 2 Ship with shell plating Longitudinal position of this section, if not at LBP/2: fro: Measureent of depth oulded at this section, if taken: SB: PS: f = f =. d = d =. Baseline K hk =.. Fig. 3 Ship without shell plating (wooden hulls etc.) Longitudinal position at this section, if not at LBP/2: fro: Measureent of depth oulded at this section, if taken : SB: PS: Any additional inforation, sketches etc. should be subitted. 4

5 Norwegian Maritie Authority Report HYDROSTATIC PARTICULARS FOR THE INCLINING TEST CONDITION Measured values: Prior to incline After incline Draught reading forward: Correction for keel/keel plate: Correction for longitudinal location: Moulded draught to rabbet at FP, d F : Draught reading aft: Correction for keel/keel plate : Correction for longitudinal location: Moulded draught to rabbet at AP, d P : Depth oulded: Freeboard easureent aidships SB: Freeboard easureent aidships BB: Mean freeboard aidships: Deck thickness, ships with shell plating: Correction for longitudinal location: Correction for sagging/hogging (enclose calculations) : Mean draught to baseline at LBP/2, d : Tri t=(d A -d F ) inus design tri (rake of keel): Hydrostatic data fro curves/tables for tri= Extree displaceent fro hydrostatics: Corrected for tri as appropriate: Corrected for specific gravity of sea water: Corrected for.: by ste/stern tonnes tonnes tonnes tonnes Extree displaceent during the test, : tonnes Transverse etacentre above baseline, KM T : KM T for tried waterline: Moent to change tri 1 c, MCT 1 CM: Longitudinal centre of buoyancy, LCB: Vertical centre of buoyancy, VCB: Longitudinal etacentre ab. B.L. (KM L ), if MCT ust be calculated: t/c 5

6 Norwegian Maritie Authority Report DESCRIPTION OF INCLINING WEIGHTS Weight no. Mass (tonnes) Material Date Verification Surveyor Placeent of weights prior to first oveent 7. PENDULUMS Pend. no. Length Location Note: If a pendulu is replaced by a U-tube or siilar device the transverse distance between the easuring posts is indicated as length in above table. A sketch of the arrangeent shall be enclosed with the report. 6

7 Norwegian Maritie Authority Report TANK CONTENTS FOR DEDUCTION Tank no. Contents Sounding Volue 3 Sp. grav. γ t/ 3 Mass t Vertical centre of gravity Vertical oent t Longitudinal centre of gravity Longitudinal oent t oent of inertia, i 4 γ i t Correction for free surface: γ i =.. Note! If the aount of (sea)water ballast / fuel oil exceeds approxiately 20% of, the specific gravity shall be verified (all tanks). 7

8 Norwegian Maritie Authority Report SUCCESSION OF WEIGHT MOVEMENTS Moveent no Direction, indicate with arrows PS (-) C.L. SB (+) Weight no(s). oved 10. GENERAL REQUIREMENTS FOR CONDUCTION OF THE TEST: The following ites shall be checked and found in order by the person in charge of the test before this report is subitted to the surveyor for approval: 1. The deflections shall be easured at at least two (2) stations, of which at least one shall be a pendulu. 2. List before first oveent shall be as sall as possible. The results will not be acceptable without exact calculation of the righting oent(s) if the su of list and inclination exceeds 5 o to one side. 3. The test will not be approved if, due to list, the ship has not been inclined beyond the upright position. 4. Maxiu deflection to both sides shall be 2 o - 4 o. For large ships (tankers, bulk carriers etc.) 1,5 o ay be accepted. For unconventional designs and ships with especially large initial stability (GM T ) other values ay be peritted subject to acceptance prior to the test. 5. Pendulu length and axiu heeling oent applied shall be so adjusted that axiu deflection read is not less than For the test to be approved, at least eight (8) successful readings, including the starting point, shall be obtained and these readings shall lie on an approxiately straight line for all easuring stations. 7. The difference between actual tri and the tri in the hydrostatic data used shall not exceed 0,01*LBP. 8

9 Norwegian Maritie Authority Report MEASURED METASENTRIC HEIGHT FOR THE SHIP AS INCLINED Displaceent during the test =.(tonnes) Pendulu 1, Length L 1 = () Pendulu 2, Length L 2 =..() (1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) Mov. nr. Mass Transv. distance Single oent Accuulated oent Single pendulu Accu. pendulu Accu. Tan ϕ Single GM T Single pendulu Accu. pendulu Accu. Tan ϕ +/- deflection deflection ( 4) * L deflection deflection 1 =(2)*(3) =Σ(4) +/- =(7)/L 1 * (6) +/- =Σ(6) =Σ(9) () (t) () (t) (t) () () () () = ( 10) / L 2 Single GM T 4) * L *(9) () ( 2 Use positive sign for (3), (6) and (9) when oving weights towards SB. Negative sign when oving towards PS. Accuulated Tan ϕ shall be plotted continuously during the test, as a function of accuulated oent. 9

10 Norwegian Maritie Authority Report RESULTS FROM THE INCLINING TEST KM T for tried waterline Measured GM T, pendulu 1 Measured GM T, pendulu 2 [Measured GM T, pendulu 3 ] Average GM T Correction for free surface in tanks + Vertical centre of gravity above baseline for the ship as inclined If the hydrostatic data is calculated for actual tri during test: t LCG LCB ( VCG VCB) Lpp = = (with tri by stern taken as negative) If the hydrostatic data is interpolated fro curves/tables: ( KML VCG) * MCT1 = 100* LBP = t/c Longitudinal centre of gravity: t * MCT1c *100 LCG = LCB = (Tri by stern taken as negative) Calculation of LCG Graphical ethod which should be used for calculation of GM BL M L At LBP/2 LCG LCB VCG VCB A o tan ϕ Draw a straight line through the ean of the plotted points. Mark two arbitrary points A og C as far apart as possible on the straight line GM = BC( t) AB * ( t) C B 10

11 tanϕ PS MOMENT SB Pendulu no.: 11

12 tanϕ PS MOMENT SB Pendulu no.: 12

13 13. CALCULATION OF LIGHT SHIP Ite Weight (tonnes) C.G. above B.L. () Vertical oent (t) C.G. fro LBP/2 () Longitudinal oent (t) Ship as inclined: Weights to be taken on board: SUB TOTAL: + Weights to be taken ashore: Tanks fro table 8 SUB TOTAL - LIGHT SHIP 13

14 14. PARTICULAR WEIGHTS INCLUDED IN THE LIGHT SHIP The light ship as calculated shall exclude cargo, fuel, lubricating oil, water ballast or other fluid or pupable ballast, potable water, feed water, sewage, provisions and other consuables as well as crew, passengers and their effects. However, the iniu aount of ooring equipent, spares etc. required by the Norwegian Maritie Directorate or the classification society as well as the iniu aount of water in boilers, syste oil in piping etc. is to be included in the light ship. The light ship data calculated in this report includes the following ites related to special operations and shall not be included in the ship s loading conditions: Ite Weight C. G. above C. G. fro Values are B.L. LBP/2 checked (tonnes) () () Yes No TOTAL WEIGHT Note: In this table ites such as fishing gear, towing gear, fixed hotel appliances, reovable odules and solid ovable ballast which ay be taken ashore in case of change of operation shall be specified. 15. COMMENTS ON THE INCLINING TEST: 14