SOLAS II-2 - Safe Return to Port Time
Safe-Return-to-Port (SRtP) endurance check for passenger ships - minimum 3 hours on each of 13 essential systems after a design casualty.
SRtP transit time
6.7h
Status
Exceeds 3 h - requires extended SRtP assessment
Formula, assumptions, and limits
SRtP mandatory for passenger ships with L ≥ 120 m or 3 main vertical zones (SOLAS II-2 Reg. 21/22). 13 essential systems include propulsion, electrical, comms, navigation, HVAC, fire safety.
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| Distance to port of refuge | nm | voyage plan | |
| Post-casualty service speed | kn | SRtP feasibility study |