calcCbw.Rd
Calculates the waterline block coefficient (Cbw
)
(dimensionless) using actual draft.
calcCbw(Cb, actualDraft, maxDraft)
Cb | Maximum block coefficient (vector of numericals, dimensionless)
(see |
---|---|
actualDraft | Actual draft (vector of numericals, m) |
maxDraft | Maximum summer load line draft (vector of numericals, m) |
Cbw
(vector of numericals, dimensionless)
The block coefficient is the ratio of the vessel's displacement and its
volume, defined by its waterline length (lwl
), breadth, and draft:
$$Cb=\frac{displacement}{lwl*breadth*draft}$$
This function returns the waterline block coefficient (Cbw
), which
represents a loaded condition estimation using actual draft using the
Riddlesworth method. Actual draft is typically obtained from sources such as
AIS messages or ship records.
NOTE: Technically, no block coefficient can be greater than 1. Even a waterline block coefficient of 1 itself is extremely improbable and can cause numerical errors elsewhere in the model. Therefore, the upper bound of the waterline block coefficient is fixed at 0.99 in this function.
MAN Energy Solutions. 2011. "Basic Principles of Propulsion."
#> [1] 0.8149052 0.6559604calcCbw(0.82,12.48,13.57)#> [1] 0.8149052