A practical checklist of gear, documents and tips so you're ready for every dive, whether tropical or cold water.
Your mask and snorkel are personal items that affect comfort and safety. A well-fitting mask prevents leaks and fogging; pack a spare strap and defog solution. A dry-top snorkel is worth it for choppy conditions.
Wetsuit choice depends on destination: for tropical waters a shorty or 3 mm is often enough; for cooler sites plan a 5–7 mm or consider renting on location to save bag space. Pack a dive computer so you always have your own profile and no-surfacing data; same for a logbook—digital or paper—to log dives and keep certifications in order.
Use reef-safe sunscreen (no oxybenzone/octinoxate) to protect your skin and the reef. For underwater photography, bring spare batteries and memory cards, and a dry bag or case; check airline rules for lithium batteries.
Carry any medications you need in original containers, plus a small first-aid kit. Have certification cards (e.g. PADI, SSI) and proof of training level; some centres and liveaboards require them. Keep digital copies and check travel documents and visas.
In tropical destinations, focus on light exposure protection, hydration and reef-safe products. For cold water, prioritise thermal protection: thicker wetsuits or drysuit, hood and gloves, and consider renting heavy gear locally.
Carry-on: keep mask, computer, logbook, medications and documents with you. Checked luggage: fins, wetsuit, BCD and regulator (in a sturdy bag). Check airline weight and size limits and consider a dedicated dive bag. Plan ahead so you board with the right gear and paperwork for a smooth trip.