The Gwladmena can be dived at any state of the tide. Realistically, most visiting divers would be wise to take advantage of liveaboard hardboats or locally chartered RIBs rather than shipping their own boats as far as the Shetlands. All taken care of with liveaboard boats. Any dive on the Gwladmena needs the prior permission of Lerwick Port Control, as it is within harbour limits. Also tell the Coastguard, as it will warn incoming ships of your position.
Most villages have a harbour and slipway.
If you take your own boat you will be spoilt for choice of launch sites. All taken care of with liveaboard boats. At more than 35m with a rectangular dive profile, this wreck is for experienced sport divers happy to do decompression dives. Nitrox can be advantageous both as a bottom mix and for decompression. Admiralty Chart 3291, Approaches to Lerwick.