Hersonissos Port has operated as a working marina since Minoan traders anchored in its natural harbour three millennia ago. Today's concrete piers replaced the original stone quays in 1982, yet the horseshoe basin still shelters the same northern coastline that Bronze Age sailors charted by star and current. The port district extends along Agias Paraskevis Street, where rental operators moor thirty-eight vessels ranging from five-metre inflatables to twelve-metre traditional caiques. Hersonissos boat hire allows visitors to reach seventeen uninhabited coves between Stalis and Malia that remain inaccessible by road. The eastern headland conceals three sea caves—Agios Georgios, Sarantari and the unnamed grotto at 35.3167° N—that shelter monk seal colonies monitored by the Hellenic Centre for Marine Research. Self-drive motorboats require no license in Greek waters if hull length stays below five metres and engine output does not exceed 30 horsepower, a regulation codified in Presidential Decree 82/2003. Most rental craft fall within these parameters. Traditional wooden boats depart from the port's western jetty, their hulls built in Sitia shipyards using Aleppo pine frames and cypress planking. These vessels follow the same construction methods documented in fifteenth-century Venetian harbour records, though modern examples incorporate fibreglass reinforcement beneath the waterline. Glass-bottom inserts—retrofitted into seven boats currently operating—permit viewing of the rocky seabed without snorkelling equipment, a modification introduced by Cretan operators in 1998. Jet boat services navigate a fixed route west toward Dia Island, maintaining minimum distances from the protected marine zone that extends two nautical miles from the islet's southern shore. The diesel-powered craft reach speeds of forty-two knots, covering the twelve-kilometre outbound leg in seventeen minutes. Morning departures between nine and eleven benefit from offshore breezes that flatten wave height to under half a metre, conditions the Hellenic Navy Hydrographic Service records as optimal for small-craft operation in this sector of the Cretan Sea.