Diving Åland isn't complicated but there are some simple guidelines that you need to adhere to in order to ensure that you trip to as safe and enjoyable as possible.
All dives are return to shot, navigation is generally easy with most wrecks being quite small (but perfectly formed). As stated above, the shotlines are not always suitable for use as a tactile reference, divers should be comfortable with buoyancy for ascent and descent…as well as on the bottom; no tidal movement means there is sediment that can be disturbed.
There will be oxygen drop bottles on the boats to be deployed if a yellow SMB is sighted (this should be to aid deco, not as an out-of-gas signal). A strobe can be useful for navigating to the shotline. You may experience some of the best visibility you have ever had, but the water will be very dark, with almost/no natural light. Shallower wrecks may have more natural light but will tend to be in greener water.
Water temperature from surface to 6-9m is approximately 15°c, 9-25m is approximately 8-10°c. Below 25m, the temperature will be 2-4°c so please plan accordingly! August is the warmest time of year from a deco perspective, the bottom temperature is the same year round.