The Ultimate Gear Guide: What to Pack for a Week-Long Dive Expedition

Ever stared at a half‑filled suitcase and wondered if you’re missing the one thing that could turn a perfect dive week into a scramble? I’ve been there—standing in a hotel lobby, clutching a wetsuit that smells like a fresh‑caught tuna, and realizing I left my backup mask at home. This guide is my way of making sure you never have that panic moment again. Pack smart, dive happy, and keep the ocean smiling.

Planning Your Pack

Know Your Dive Profile

Before you even think about zip‑tying a bag, write down the basics: water temperature, depth range, and the type of dives you’ll be doing. A tropical reef at 25 °C calls for a 5 mm wetsuit or a thin dry‑suit, while a temperate wreck at 12 °C needs a 7 mm wetsuit and possibly a hood. Knowing the environment narrows down the gear you truly need and prevents over‑packing.

Make a Checklist, Then Trim It

I swear by a two‑column checklist: “Must‑Have” on the left, “Nice‑to‑Have” on the right. After the first day of packing, cross out anything you haven’t touched in the last 24 hours. If you can’t name its purpose, it’s probably safe to leave it behind. Trust me, a lighter pack means less strain on your back and more room for souvenirs (or that extra camera housing).

Core Dive Gear

Wetsuit or Dry‑Suit

Pick a suit that matches the water temperature range you noted. For most tropical weeks, a 5 mm full‑sleeve wetsuit with a front zip works fine. If you’re heading to cooler currents, a 7 mm wetsuit with a back zip and a separate hood, gloves, and booties will keep you warm without the bulk of a dry‑suit. Remember to rinse your suit in fresh water after each dive to extend its life.

Regulator Set

A primary regulator, an octopus (the backup regulator), and a low‑pressure inflator for your BCD (buoyancy control device) are non‑negotiable. I always bring a second‑stage regulator from a different manufacturer as a safety net—if one brand has a rare defect, the other will still work. Test both before you leave home; a quick leak check with a pressure gauge can save you a lot of trouble underwater.

BCD (Buoyancy Control Device)

Choose a BCD that fits snugly but allows freedom of movement. A “back‑inflation” style is my favorite for reef dives because it keeps the air tanks low and the center of gravity stable. Make sure the straps are adjustable and the dump valves are easy to reach. A small repair kit with a zip tie, a spare inflator hose, and a few extra clips can be a lifesaver.

Dive Computer

A dive computer tracks depth, time, and nitrogen load, helping you stay within safe limits. I prefer a wrist‑mounted model with a clear OLED screen—no need to fumble with a bulky console. Set it to the appropriate algorithm for the dive type (recreational, technical, or freediving) and double‑check the battery before each day.

Mask, Snorkel, and Fins

A low‑volume mask (the space inside the mask is small) equalizes faster and reduces the amount of air you need to clear. I keep a spare silicone strap in my bag; they’re cheap and can save you a ruined mask. For snorkels, a purge valve is a blessing when you’re surfacing with a mouthful of water. As for fins, I’m a fan of split‑blade designs—they’re efficient and less tiring on long reef swims.

Weight System

If you’re using a weight belt, bring at least 5 lb of extra lead in case you need to adjust for different boat conditions. Many modern BCDs have integrated weight pockets; I load them with small, sealed weight pouches that can be added or removed on the fly.

Surface Support Essentials

Dive Bag

A sturdy, water‑resistant dive bag with multiple compartments keeps everything organized. Look for a bag with a reinforced bottom and a detachable dry sack for your electronics. I always label the interior pockets with waterproof tags—no more hunting for my spare regulator in the dark.

First‑Aid Kit

A compact kit with bandages, antiseptic wipes, marine‑safe sunscreen, and a few oral rehydration packets is essential. Add a small vial of iodine for treating minor cuts—sea water is a breeding ground for infection.

Tools and Spares

Carry a multi‑tool, a spare O‑ring set for your regulator, a few extra fin straps, and a silicone sealant tube. A small screwdriver set is handy for tightening loose screws on your camera housing or adjusting the BCD’s buckles.

Documentation

Don’t forget your dive logbook (or a digital app), certification cards, and a copy of your travel insurance that covers scuba activities. A waterproof pouch for these items protects them from splashes and salty spray.

Photography Kit

Camera and Housing

If you’re planning to capture the underwater world, a DSLR or mirrorless camera with a dedicated underwater housing is a must. I use a housing with a built-in port for a wide‑angle lens—great for reef panoramas. Pack a spare O‑ring and a silicone grease tube to keep the seals watertight.

Lighting

Two strobe lights give you balanced illumination, especially when diving at depth where natural light fades. Bring spare batteries and a quick‑release bracket so you can swap lights without fumbling in the water.

Memory and Power

At least two high‑capacity memory cards (64 GB each) and a portable charger for your camera’s battery pack. I also keep a small solar charger in my bag for those days when the boat’s power supply is limited.

Conservation Extras

Reef‑Safe Sunscreen

Most conventional sunscreens contain oxybenzone, which harms coral. Pack a reef‑safe, zinc‑oxide based sunscreen and reapply responsibly.

Biodegradable Soap

If you need to freshen up after a day on the boat, use a biodegradable soap that won’t pollute the water when rinsed off.

Citizen Science Kit

A simple underwater identification guide and a waterproof notebook let you log sightings of marine life. Many research groups welcome data from recreational divers—your observations could help protect a species.

Packing Tips from the Trenches

• Roll, don’t fold your wetsuit to save space and prevent creases.
• Stuff socks and small items inside your fins; they’re perfect little storage pockets.
• Use zip‑lock bags for electronics and spare parts—dry and organized.
• Label everything with a permanent marker; even a tiny “camera housing” tag can save minutes when you’re underwater and need to grab the right piece.

With this list in hand, you’ll step onto the boat feeling prepared, not paranoid. The ocean is unpredictable, but your gear doesn’t have to be. Dive deep, stay safe, and let the currents carry you to unforgettable moments.