The following rules are applied by AHOI for soundings:
• In waters that are shallower than 31 metres, depths are given in metres and decimetres.
• In waters that are 31 metres or deeper, depths are shown in metres only.
• A rounding point of .065 is used to round the sounding value upwards or downwards:
Rules
Range | Level | Shallowest | Deepest | Direction | Result |
|---|---|---|---|---|---|
0.000 to 30.999 | x.1 | x.y00 | x.y64 | Shallower | x.y |
x.1 | x.y65 | x.y99 | Deeper | x.(y+1) | |
31.000 and deeper | x | x.000 | x.649 | Shallower | x.000 |
x | x.650 | x.999 | Deeper | x+1 |
Example
0.1 Level | 1.0 Level | ||
|---|---|---|---|
Depth (m) | Display (m) | Depth (m) | Display (m) |
0.000 | 0 | 31.000 | 31 |
0.010 | 0 | 31.649 | 31 |
0.064 | 0 | 31.650 | 32 |
0.065 | 0.1 | 31.999 | 32 |
0.099 | 0.1 | 32.000 | 32 |
0.100 | 0.1 | 32.649 | 32 |
0.164 | 0.1 | 32.650 | 33 |
0.165 | 0.2 | 32.999 | 33 |
0.199 | 0.2 |
| |
0.900 | 0.9 | ||
0.964 | 0.9 | ||
0.965 | 1 | ||
0.999 | 1 | ||
30.900 | 30.9 | ||
30.964 | 30.9 | ||
30.965 | 31 | ||
30.999 | 31 | ||