Rules
The following rules are applied by NAVOCEANO for sounding rounding:
• Deeper than 40 metres: If the decimal part is greater or equal to 0.8 round to the deeper whole unit else round to the shallower whole unit.
Example: 40.7 rounds to 40, 40.79 rounds to 40,
40.78 rounds to 41
• Deeper than 30 metres: If the decimal part is greater or equal to 0.8 round to the deeper whole unit Else if the decimal part is greater or equal to 0.3 round to 0.5 else round to the shallower whole unit
Example: 30.2 and 30.29 round to 30, 30.3 rounds to 30.5
30.7 and 30.79 round to 30.5, 30.8 rounds to 31.
• Shallower or equal to 30: If the second decimal is greater or equal to 0.05 round to the deeper first decimal Else round to the shallower first decimal
Example: 20.740 and 20.749 round to 29.7
29.75 rounds to 29.8.
Range | Level | Shallowest | Deepest | Direction | Result | |
|---|---|---|---|---|---|---|
0.000 | 29.999 | x.1 | x.y00 | x.y49 | Shallower | x.y |
0.000 | 29.999 | x.1 | x.y50 | x.y99 | Deeper | x.(y+.1) |
30.000 | 39.999 | x.5 | x.000 | x.299 | Shallower | x.000 |
30.000 | 39.999 | x.5 | x.300 | x.799 | Either | x.500 |
30.000 | 39.999 | x.5 | x.800 | x.999 | Deeper | x+1 |
40.000 | 9999 | X | x.000 | x.799 | Shallower | x |
40.000 | 9999 | X | x.800 | x.999 | Deeper | x+1 |
Example
0.1 Level | 0.5 Level | 1.0 Level | |||
|---|---|---|---|---|---|
Depth (m) | Display (m) | Depth (m) | Display (m) | Depth (m) | Display (m) |
0.000 | 0 | 30.000 | 30 | 40.000 | 40 |
0.049 | 0 | 30.299 | 30 | 40.799 | 40 |
0.050 | 0.1 | 30.300 | 30.5 | 40.800 | 41 |
0.099 | 0.1 | 30.799 | 30.5 | 40.999 | 41 |
0.100 | 0.1 | 30.800 | 31 | 41.000 | 41 |
0.149 | 0.1 | 30.999 | 31 | 41.799 | 41 |
0.150 | 0.2 | 39.000 | 39 | 41.800 | 42 |
0.199 | 0.2 | 39.299 | 39 | 41.999 | 42 |
0.900 | 0.9 | 39.300 | 39.5 | ||
0.949 | 0.9 | 39.799 | 39.5 | ||
0.950 | 1 | 39.800 | 40 | ||
0.999 | 1 | 39.999 | 40 | ||
29.900 | 20.9 | ||||
29.949 | 20.9 | ||||
29.950 | 30 | ||||
29.999 | 30 | ||||