It's due to the forecasted adverse weather conditions
There's uncertainty over Manxman sailings in the next three days.
The Steam Packet Company says it's due to adverse weather forecasts.
This mornings (5 December) 10am sailing from Douglas to Heysham has already been cancelled.
This evening's 7.45pm journey and every other journey until Saturday evening is at risk.
A decision on tonight's sailing will be made by 5.30pm.

Below is a full list of all the crossings at risk:
Thursday (05 December)
- 7.45pm – Subject to disruption/cancellation – final decision by 5:30pm.
Friday (06 December)
- 2.15am - Subject to disruption/cancellation – final decision by 5:30pm Thursday evening.
- 8.45am – Subject to disruption/cancellation – final decision by 7am.
- 2.15pm – Subject to disruption/cancellation – final decision by 7am.
- 7.45pm – Subject to disruption/cancellation – final decision by 5.30pm.
Saturday (07 December)
- 2.15am – Subject to disruption / cancellation – final decision by 5.30pm Friday evening.
- 8am – Subject to disruption / cancellation – final decision by 6am.
- 6.45pm – Subject to disruption / cancellation – final decision by 6am.
'Progress was not consistent across all services': Manx Care publishes annual report
Court formally orders supervised recount
Police 'making enquiries' after report woman was cornered in pub toilet
Businessman calls for inquiry after court critiques police conduct