Utila

The island runs on dive shops, and the daily pattern reflects it. Boats leave from private docks along the harbour front, usually a short walk from wherever you are sleeping, for a two-tank morning and a single afternoon tank, with night dives and professional courses filling out the week. Trips get interrupted: if the crew spots frigatebirds working a surface boil of feeding bonito, the boat breaks off and everyone gets ready to slip in with mask and snorkel instead.

Which side of the island you dive is decided by the wind. The southern shore is sheltered most of the time, with shallow reef, sand patches and easy moorings, which makes it the default for courses and for the sunken freighter. The north side is steeper, with drop-offs, caverns and cuts through the reef, but it needs a settled day to reach comfortably. Pinnacles rising off the shelf add blue-water dives when the boats can get to them, and the silty bays along the north shore, inside the Turtle Harbour reserve, are dived slowly at torch range, hovering clear of a bottom that clouds at a fin-kick.

It attracts a particular crowd: people learning on a budget, divemaster and instructor candidates settling in for months, and divers who want quantity over polish. Expect a young, social, sometimes noisy town, accommodation bundled into course prices, and a wide spread in operator standards. Since prices cluster, the useful questions are about group size, how many students share an instructor, and the state of the boats and rental gear. Anyone after quiet, resort comfort or bigger boats does better on the neighbouring islands.