The Stornoway ferry service has been cancelled after the vessel broke down in rough seas.
One of two engines on the Caledonian MacBraynes ferry stopped working as the ship made its way through rough weather in the Minch on Tuesday.
The fault, with a cooler pump, forced the MV Isle of Lewis to limp into Ullapool on just one engine, reaching the mainland two hours late after her captain made the decision not to turn back to Lewis.
Maritime regulations mean the Cal Mac ship cannot sail on just her starboard engine.
Numerous passengers, cars and freight lorries are stranded on both sides of the Minch after all subsequent Tuesday sailings were cancelled.
It is not yet known how long it will take to repair the problem.
The operating company is asking travellers not to turn up at their point of departure.