Operating-speed window of an escort tug based on rudder-direct / indirect assist mode - the governance of escort missions for laden tankers.
Formula
$$ v = f(\text{tug type}, \text{assist mode}) $$Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $ASD$ | Azimuth Stern Drive | - | tug type |
| $Indirect$ | Tug hull used as rudder at speed | - | tug operation |
Sources
- ISPO Escort Tug Guidelines.