Lo1/2 calculation steps Flashcards
What are the steps to the drydocking solution?
- find AMD to get LCF.
- Find TMD and the use to get new displacement, MCTC and LCF.
- Calculate P
- Calculate effective displacement and use to find KM
- Find Loss of GM
- KM at critical instant- KG = Initial GM-Loss of GM = GM at critical instant.
(to obtain the draughts at that instant put the effective displacement into data sheet).
What are the steps to the inclining experiment solution?
- GM = w x d x length/displacement x deflection.
- KG = KM-GM
(For KG at lightship create a moments table and subtract all unnecessary weight and add machinery).
What are the steps to the Angle of heel when turning solution?
- Knots = (V x 1852)/3600 = m/s
- GM = KM-KG
- BG = KG-KB
- Tan0 = V2 x BG/g x R x GM
(For max speed skip part 1. and just rearrange tan equation).
What are the steps to the Righting Moment solution?
RM = (GM x Sin0) x displacement
What are the steps to the Wall sided formula solution?
- Calculate KB.
- Calculate BM.
- KM = KB + BM
- GM = KM - KG
- GZ = (GM + BM x Tan2/2) x sin0
What are the steps to the Free Surface Moments solution?
lb3/12 x dt
What are the steps to the Icing allowance solution?
- Deck volumes x 30m3 = KG then convert to tonnes.
- Calculate vertical surface by x 15 then converting KG to tonnes.
- Calculate the 10% allowance for the boom moments and 5% for the weights.
- Make a moments table to get new KG.
- GM = KM - KG
What are the steps to the bilging compartment solution?
- Total loss of buoyancy = total buoyancy gained
- Loss x B x D = (L - Loss) x B x (X) to find X.
- Add X to depth to obtain draught.
- to find KM work out KB & BM (KG remains the same).
What does the change in GM equal?
Change in KM.
What are the steps to the perability percentage solution?
What are the steps to the FSM double bottom tank solution?
- Mass of ballast transferred.
- FSM = LB3/12 x P x 2 tanks.
