Sam Holmes Sailing · video

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Sam Holmes and Arlene sail from Coe Rock through Five Islands, Maya Bay, Phi Phi Island, and Shark Island before reaching Phuket, Thailand, where they complete an advanced scuba certification and a Nitrox certification with instructor Julian from All 4 Diving.3:15 The advanced course covered underwater compass navigation and a 100-foot depth dive; Sam notes the course added little new skill content beyond the open-water certification but unlocked access to dive sites and tank rentals that had previously been refused.12:20 The Nitrox certification required using an oxygen analyzer, setting dive computers to the correct mix percentage, and understanding how higher oxygen content reduces nitrogen absorption to allow more dives per day.15:48 Six scuba tanks were brought to Phuket for hydrotesting; two Chinese-made tanks failed inspection and were discarded.18:40 Boat projects included a third attempt at installing a saltwater rinse-down pump using a dedicated seacock, sea strainer, and self-priming pump — successfully completed; repairing a shredded daggerboard up/down line using a 3D-printed wedge to hold the board while rerouting the rope; disassembling and reassessing a jammed rope clutch (identified as inferior to Garhauer clutches, with worn internal springs); replacing halyard mast-slap whoopie slings with smooth carabiners; and testing a $40 Wi-Fi security camera that was destroyed by accidental 12-volt supply when it required only 5 volts.9:02

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