calcAbt.Rd
Estimate transverse bulb area (Abt
) (m^2) using method in
Rakke (2016).
calcAbt(Cm, breadth, actualDraft)
Cm | Midship area coefficient (dimensionless) (see |
---|---|
breadth | Moulded breadth (m) |
actualDraft | Actual draft (m) |
Abt
(vector of numericals, m^2)
Transverse sectional area of the bulb at the position where the still-water surface intersects the stem (m^2) using actual draft. Actual draft is typically obtained from sources such as AIS messages or ship records.
Holtrop, J. and Mennen, G. G. J. 1982. "An approximate power prediction method." International Shipbuilding Progress 29. p. 166-170
Rakke, S. G. 2016. "Ship Emissions Calculation from AIS." NTNU
calcAbt(0.98, 32, 10)#> [1] 25.088#> [1] 25.0880 55.8558