HFD File
- Last UpdatedFeb 01, 2023
- 1 minute read
The format of the HFD file, used to define Section Design data, is shown below. The HFD file defines an arbitrary range of sections using common Waterlines.
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Record 1: |
Principal Dimensions |
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LPP B T D CM HS ROF NWLS |
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where |
LPP B T D CM HS ROF NWLS |
= Length between perpendiculars = Moulded breadth = Draft = Height of topmost Waterline = Maximum section area coefficient = Half siding of keel = Rise of Floor = Number of Waterlines |
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Record 2: |
Waterline Heights |
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0.0 Z(1) Z(2) ...... Z(NWLS) |
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where z(i) |
= |
Height of Waterline from baseline for each of NWLS Waterlines, first Waterline height is zero. |
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Record 3: |
Number of Sections for which sectional offset data is given. |
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NSTN |
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Record 4: |
Section Offsets for Each Section, repeated NSTN times. |
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STN |
Y(0) |
Y(1)......Y(NWLS) |
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where |
STN |
= |
Position of the section with respect to the origin. |
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Y(0) |
= |
Flat of Bottom offset. |
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Y(n) |
= |
Section offsets measured from the centreline at each Waterline. |
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Record 5: |
Stern and Stem Data, repeated NWLS+1 times. |
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STRN STEM |
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where |
STRN |
= |
Distance of stern profile from the AP. |
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STEM |
= |
Distance of stem profile from the FP. |
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