Pilot Boarding - Wake Risk
Wake-wash risk during pilot boarding - ship speed-height-above-water threshold before ladder unsafe.
Froude number
0.073 -
Status
Acceptable wake
Formula, assumptions, and limits
High Fn → steep wake waves. Large ship at 7 kn Fn ≈ 0.07 - very safe; small fast pilot boat can still match. IMO MSC.1/Circ.1428 recommends ≤ 0.15 × √L.
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| Froude number | - | speed / √gL | |
| LBP | m | ship particulars |