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Appendix 1 - Downflooding height measurement examples
Downflooding Height (upright)
HD
* If the engine space of an open boat is provided with a high water alarm and fitted with an efficient bilge
pumping system, louvered engine space vents are not considered downflooding openings.
Appendix 2 - Evaluation criteria ^
Minimum downflooding height (m) in upright condition
| Fully decked vessel |
|
L/17 |
| Open vessel |
6m – 7.5m |
L/10 |
| |
7.5m – 12m |
0.75m |
| |
L – Length, as defined on page 4, in metres. |
| Examples: |
7 metre fully decked vessel |
41 cm (7 m/17 = 0.41 m) |
|
7 metre open vessel |
70 cm (7 m/10 = 0.70 m) |
Maximum allowed offset load heel angle
| Vessel length (m) |
6 |
7 |
8 |
9 |
10 |
11 |
12 |
| Maximum offset heel angle (°) |
15.2 |
13.8 |
12.5 |
11.0 |
10.0 |
9.1 |
8.3 |
Minimum residual downflooding height
| Vessel length (m) |
6 |
7 |
8 |
9 |
10 |
11 |
12 |
Minimum residual
downflooding height (m) |
0.27 |
0.29 |
0.31 |
0.33 |
0.35 |
0.36 |
0.38 |
Note: Calculate values for intermediate lengths and for lengths over 12 m (not more
than 15 tons gross tonnage)
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