For Scapa (or, now, Shetland) ... just book it!
Cabins are big enough - although you'll need to pack light (and use collapsible bags for kit that you unload) - although there is not much cupboard storage.
The bunks are comfortable but quite narrow... and ... bring earplugs as a defence against your diver colleagues :)
There is a very nice forward double cabin for couples - if you are a couple, make sure you beat your buddies to that one (although you might end up on pre-breakfast tea & toast duty as it's right below the galley).
A little downside it that the toilet and shower facilities (x2) are up on the main dive deck. This means a rather treachorous middle-of-the night accent up a ladder if you need to pay a visit in the early hours.
Finally, for this accommodation review, the breakfast that Fiona puts together (for after the first dive) is fantastic! :)
Diving - spot on. Ian runs a tight ship and will answer any questions directly and accurately. Drop-offs and pick-ups were always spot on, as were gas mixes and support for tech diving needs. This isn't really the place for in-depth (sorry for the pun) diving review - but as I said at the start, just book it. read more