Rhinia - a Cruising Guide on the World Cruising and Sailing Wiki
The anchorage at Delos may only be used between 0800 and 1500 for the purpose of visiting the archaeological site. It is entered from the S between the islet of Megali Rematia and Delos (while there is a narrow passage
between the N end of Megali Rematia and the breakwater of Delos, depths are reportedly as little as 2.0 metres and this passage
is not for the fainthearted). Megali Rematia should be given a good clearance on entry, especially on the SE side, as there are dangerous reefs
around its shores. Proceed up the channel between Megali Rematia and Delos in the direction of the small tripper boat harbour, which is protected from northerlies by a 200 metre long breakwater. Depths are better on the port side of the channel (but only once past the dangerous reef at the SE end of Megali Rematia) and shoal rapidly from 15-18 metres at the entrance to only 3.0 - 4.0 metres or less near the breakwater. Most yachts anchor
about 100 metres due S of the breakwater end in 4.0 - 5.0 metres. The holding here is only moderately good in sand and rock and it is advisable to use at least 35 metres of chain and snub your anchor carefully before leaving your yacht. Dinghies are directed to land at the steps at the NE end of the breakwater, clear of the tripper boat quay.
Warning: Proceed north, up the shallow channel between Delos and Rhinia watching out for the many reefs