Estimate transverse bulb area (Abt) (m^2) using method in Rakke (2016).

calcAbt(Cm, breadth, actualDraft)

Arguments

Cm

Midship area coefficient (dimensionless) (see calcCm)

breadth

Moulded breadth (m)

actualDraft

Actual draft (m)

Value

Abt (vector of numericals, m^2)

Details

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.

References

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

See also

Examples

calcAbt(0.98, 32, 10)
#> [1] 25.088
calcAbt(c(0.98,0.99), c(32,45.5), c(10,15.5))
#> [1] 25.0880 55.8558