Ferry Mode

tachograph:
To legally have a daily rest period on a ferry or train you must have access to a bunk or couchette.

Article 9 - Regulation (EC) No 561/2006 of the European Parliament and of the Council

Article 9 Regulation 561/2006

Ok, but my tachograph doesn’t know what arrangements were available on the ship, so why has it spat the dummy. That’s really all I want to know. TIA.