Jersey Fire and Rescue pulled a car out of the way of the rising tide at Green Street Slipway yesterday evening.
Officers arrived at the slipway that overlooks La Collette to find a UK-registered car close to being swept away by the rising tide.
Crew pulled it out of the way and have since renewed a warning not park on slipways.
Many of the island's slipways have restrictions on parking so that emergency services can have unhindered access to beaches.
It follows a similar call last month, where a parked car delayed the emergency response to a casualty on a beach, with the Station Commander saying leaving a car on slipways 'could cost lives'.

Plans to modernise Jersey's 'extremely outdated' cremation rules
Driver 'seriously injured' in Grouville crash
Jury finds Shay John Bester guilty of offences including rape
African community groups express 'disappointment' with Deputy Ozouf sentencing
Island Energy to return to Royal Court over Mont Pinel gas explosion
Jersey to introduce legal limit for PFAS in drinking water
Jersey Electricity drops St Martin solar farm idea
PPC won't move to block Deputy's return to States Assembly