Tug in Dunnet Bay?

[davem]

There is a tug, red and white in Dunnet Bay just now going slowly West towing a large raft of something, not on ShipsAis - any clue as to what it is doing?
Not usually so nosey but it looks really unusual
Cheers for any suggestions Dave

[mi16]

Could it be the C-Chariot?

[davem]

Thanks, that looks right, now wondering if if it's salmon pens being towed.