Definition
Dynamic load in towing is the transient increase in towline force caused by vessel motion, wave action, shock loading, or abrupt changes in relative speed and direction.
Why it matters
Static bollard pull figures do not capture the real forces a tug or towing system may experience in seaway conditions. Dynamic peaks can part wires, overload fittings, or destabilize towing arrangements.
Common triggers
- Waves and swell causing cyclical surging
- Sudden braking or acceleration
- Towline snatch as slack comes out
- Large heading changes under load
Related incidents
Accidents linked to this concept are grouped by vessel type.