Windlass Pull - Class Rule Minimum
Minimum continuous pull required of a windlass per IACS UR A1 - a function of anchor mass and chain diameter.
Required windlass pull
196.4kN
Formula, assumptions, and limits
Includes 2× anchor weight (= anchor + hawse-pipe friction) and chain-weight factor. Holding load on brake = breaking strength × 0.8, design for 45° cable.
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| Anchor mass | kg | certificate | |
| Chain link diameter | mm | chain cert |