🚢 The basics of Draft Survey - Best Practices Series of Part 2 - Calculation

[@아르마딜로-w8z]

some questions... the small ship is trim by head... and if lcf +4.25 from hydrostadic table... what is first trim correction sign? - or +? because i know about the first trim correction sign... when i...calculation draft survey... trim-by the stern... and LCF sign +(fwd)...first trim correction sign -.. LCF sign -(aft)..fst trim correction sign -... trim by the head.. LCF sign +(fwd)...fst trim correction sign +.. lcf sign -(aft)...fst trim correction sign -... is it always adjust to the any ship..and when draft survey...fst trim correction sign..decided the rule?... ref.my fst trim Correction calculation.... ture trim(Cm) × t.p.c x lcf ÷ L.B.P...

[@ShipAhoyVlogs]

First Trim Correction Rules: Trim by the Stern: Fwd Corn = Minus(-) After Corn = Plus (+) Trim by the Head/Stem: Fwd Corn = Plus (+) After Corn = Minus (-) Midship Corn is parallel to Fwd Corn However, please see your ship hydrostatic tables. It should be indicated there how you may apply since you mentioned a small ship. In General, the bigger ship like 5,7,9 holds ..this rule is basically used.

[@ernieaguilar3997]

@@ShipAhoyVlogs good pm sir i would like to ask in your formula in trim correction A True trim x tpc x lcf x 100/LBp my usual formula but in your formula you include lbp/2 - lcf x trim x tpc x 100 ÷lbp cant get it tks

[@samthesailor1759]

Is hogging or sagging give any affected in draft survey??

[@ShipAhoyVlogs]

it does affect draft survey

[@samthesailor1759]

@@ShipAhoyVlogs can you plz tell how to calculate draft survey in hogging and sagging condition ? TIA

[@ShipAhoyVlogs]

@@samthesailor1759 I don't have tine to do, Perhaps this link can help you kzbin.info/www/bejne/pnS2fniYh66WpJY

[@YURAN258]

Sr. Some questions you said LBM =221.5mtrs and LBP=223mtrs. The questions is here for find LBM we use "LBP-dfw-daft" In this exemplo, our dfw is 1.5, and our daft for aft pp is 2.0 Our LBP is 223mtrs LBM=LBP-fw pp - Aft pp LBM= 223-1.5 - 2.0 = 219 But here our LBM is 221.5mtrs how??

[@ShipAhoyVlogs]

I apologize, it was an error on my part.

[@ShipAhoyVlogs]

@@YURAN258 just follow the formula.

[@taslimtaslim1471]

List correction...???

[@RISSLILY0329]

Good day po...May tanong lang po regarding sa : 1.) Yung sa TRIM CORRECTION A yung formula = true trim x (LBP/2) - LCF....YUNG LBP po ay ang Length bet. perpendicular po yan di ba? kasi sa Given ang LBP ay 223 meters at ang LBM/LBD ay 221.5 meters? 2..) Yung (-)LCF sa formula po, Constant na po ba yang Negative sign nang LCF? or magdedepende yan sa hydrostatic table? 3.) Yung figure po ba dyan nang LCF mula sa Hydrostatic Table , Hindi po ba yan ininterpolate? kagaya nang pagkuha nang Displacement? 4.) Regarding sa pag apply nang 1st and and 2nd Trim Correction, yung TRIM CORRECTION A, ibabawas po ba yan sa Displacement (corrtd ) kung naka (-) negative sign ang figure nang LCF sa hydrostatic Table? 5.) Ang Quarter Mean po na 7.6979m, Sapagkuha po nang LCF at TPC basi sa Quarter mean, Hindi po ba iniinterpolate ang pagkuha nang LCF at TPC basi sa 7.6979??

[@ShipAhoyVlogs]

1) 221.5 ata nalagay ko dun . Sorry typo error. 2) LCF sign is based sa table 3) interpolate mo kung Wala saktong katumbas 4) ndyan ung rules nya oaki check mo na lng. 5) dalawa method ung sample dyan ung Isa may interpolation.

[@ernieaguilar3997]

@@ShipAhoyVlogs good pm sir sa trim correction A dko po makuha ang answer kasi ang formula ay =true trim ×lcf ×tpc x100 divide sa lbp pero pag iapply mo ang lbp /2 hindi lalabas ang answer 311 pls kindly teach how tks