The Hydro function, as noted on the previous page, uses 6 arguments:
Specific gravity, Zcg, Sink, Trim, Heel, Index
Please reference the table below for the description of each Index.
Index |
Units of Result |
Result |
1 |
Length |
forward end of waterline |
2 |
Length |
aft end of waterline |
3 |
Length |
waterline length |
4 |
Length |
waterline maximum beam |
5 |
Length |
maximum draft |
6 |
Length^3 |
displaced volume |
7 |
Length |
X coordinate of center of buoyancy |
8 |
Unitless |
center of buoyancy as % of waterline |
9 |
MLT^-2 |
displacement |
10 |
Length |
Y coordinate of center of buoyancy |
11 |
Length |
Z coordinate of center of buoyancy |
12 |
Length^2 |
waterplane area |
13 |
Length |
X coordinate of center of flotation |
14 |
Unitless |
center of flotation as % of waterline |
15 |
Length^2 |
wetted surface |
16 |
Length |
X-coordinate of wetted surface center |
17 |
Length |
Z-coordinate of wetted surface center |
18 |
Length |
transverse metacentric height |
19 |
ML^2T^-2 |
transverse righting moment per degree |
20 |
Length |
longitudinal metacentric height |
21 |
ML^2T^-2 |
longitudinal righting moment per degree |
22 |
Unitless |
waterplane coefficient |
23 |
Unitless |
prismatic coefficient |
24 |
Unitless |
block coefficient |
25 |
Unitless |
maximum section coefficient |
26 |
Unitless |
displacement-length ratio |
27 |
Length^2 |
lateral plane area |
28 |
Length |
X coordinate of lateral plane center |
29 |
Length |
Z coordinate of lateral plane center |