Whats The law on using ferry/train mode

205:

tachograph:

205:
Should you use it every time you board a ferry/train or only when you are splitting your rest period by driving on/off a ferry/train.

Ferry train mode is basically to show why you’re interrupting your daily rest period when travelling by ferry or train.

so no need to use it if im not on a rest period?

That’s right, if you’re not booking a rest period on the ferry there’s no need to use the ferry/train option.

I mean you can if you want but there’s no need