Elounda's port has anchored private charters for over a century, first as a sponge-diver's harbour, later as the staging point for leprosy-colony supply runs to Spinalonga. Today the same mooring cleats launch a fleet of crewed sailboats and motor yachts that carry visitors across Mirabello Bay's 170 square kilometres of Aegean water, past islets that sheltered Minoan fishing camps and Venetian watchtowers. The bay's eastern curve holds Spinalonga, a fortified island whose ramparts rise thirty metres above the waterline — built in 1579 to guard the salt pans of Elounda, later repurposed as Europe's last active leprosy colony until 1957. The island's steep streets and arched gateways remain intact, and the €20 entry fee supports conservation work that has stabilised the perimeter walls and roofed cisterns. Most departures leave the Port of Elounda between 09:00 and 11:00, when northwesterly winds sit below ten knots and the sun angle favours photography of Spinalonga's bastions. Crewed charters range from half-day sails to Dia Island — an uninhabited nature reserve sixteen nautical miles northwest — to full-day circuits that thread through Kolokytha Peninsula's limestone coves, where depth drops from three metres to thirty within a boat length. Mediterranean monk seals patrol the outer bay; sightings cluster around dawn and late afternoon, though the population remains critically endangered and encounters are never guaranteed. Captains hold commercial shipping licences issued by the Hellenic Coast Guard and carry VHF radios tuned to channel sixteen; most vessels are insured under Greek P&I clubs and meet Recreational Craft Directive standards. The water itself is the draw. Mirabello Bay's salinity hovers near 39 parts per thousand — higher than the Adriatic, lower than the Levantine Basin — and visibility routinely exceeds twenty-five metres in the open channel. Snorkelling sites along the Kolokytha coast reveal Posidonia oceanica seagrass meadows, a UNESCO priority habitat that shelters juvenile bream and octopus. Private boat tour operators in Elounda work a narrow season: April through October, when sea temperature climbs from 16°C to 26°C and the meltemi winds — Aegean northerlies that gust to thirty knots in July and August — ease by late morning. Larger crewed yachts carry shade canopies, freshwater showers, and onboard galleys that prepare grilled seafood or meze platters sourced from Agios Nikolaos market, fourteen kilometres south. Smaller RIBs and traditional caiques prioritise speed and manoeuvrability, cutting transit time to Spinalonga from forty minutes under sail to eighteen minutes at planing speed. All charter departures require seventy-two hours' advance booking during peak weeks in July, though walk-up availability opens in May and September when hotel occupancy in Elounda drops below sixty percent.