Sixty minutes at four metres. No depth to manage, only patience. Held position over sand while attaching fragments. Buoyancy at shallow depth is harder than it sounds. Every exhale matters.

Deep specialty checkout dive. Descended to 30m, ran the skills, watched the gauge the whole time. Thirty-seven minutes total. Narcosis check was clean. Ascended on schedule, not early, not late.

Eight metres in the dark. The plan was simple: stay calm, trust the torch, follow the line. Forty minutes, no deviation. The reef looks different at night. So does your breathing.

Sixty minutes with a camera at 18m. The problem: you stop watching your gauges when you're framing a shot. Caught myself twice. Pulled the camera down, checked air, then went back. Protocol before the picture.

Simulated unresponsive diver at 9m. Brought them up, maintained airway, towed to shore. Forty minutes including debrief. First time the emergency drills felt like instinct instead of performance.

First time past 20 metres. Forty-five minutes, Silver Island wall. Everything slows down at depth. Breathing rate, decision speed, the way light changes. Ascended on schedule. Understood why the gauges exist.