Checklist for your first snorkeling day

For a first snorkeling day, bring a mask that fits, a snorkel, fins, sun protection and water, then agree on a buddy and a turn-around point before anyone enters the water. Check the weather and the water at the site, not just at home. A short list run in order, from packing to the last check at the entry, catches many of the avoidable problems on a first outing.

Split the checks between two moments. The night before, there is time to fix problems: replace a worn strap, set out the gear you will need and look up the morning's forecast and tide times. On arrival, look at the water itself, since the wind, surf and clarity at the entry can differ from the forecast, and read any posted warnings before you change into your gear.

Gear to pack

Before you pack, test each item at home. Dry-fit the mask, put the fins on with the socks or booties you plan to wear and confirm that the snorkel fits in your mouth without causing jaw strain. Then pack:

• A mask that you have tested for fit, with its strap in good condition
• A snorkel, ideally with a dry-top valve
• Fins sized to fit your feet
• A rash guard or thin wetsuit for sun protection and cool water
• Water shoes or booties for rocky or coral entries
• Sunscreen, applied before you arrive and chosen with local rules in mind
• Drinking water, a towel and a hat
• A dry bag for your phone, keys and dry clothing
• A flotation vest if you are not confident in the water

Some marine parks restrict particular sunscreen ingredients, so check local rules before you buy. A rash guard reduces how much sunscreen you need on your back and shoulders, which is one reason many snorkelers prefer one.

Weather and water checks

Check the forecast for wind, rain and storms, and check a marine forecast if one is available for your site. Wind shapes the surface and can produce chop or drift, so a breezy morning may be calm later in the day, or the reverse. Look at tide times as well, because a rising or falling tide changes depth and current on a reef. Shallow reefs that are comfortable at high tide can be exposed or fast-moving at other times.

Heavy rain can wash sediment into coastal water and reduce visibility for a day or more, so ask local staff about recent conditions. Look for posted warnings or flags at the entry, and ask what they mean, since signal systems differ by location. If the water looks rough, murky or fast-moving when you arrive, reschedule. A first day is not the time to test your limits, and a calm bay is a better place to learn than an exposed headland.

A buddy plan

Choose your buddy before you arrive, and agree on how you will stay together. Decide who checks whose gear before entering, and confirm that you can each reach the entry point and the water without help. Agree on simple hand signals. At close range, an OK sign, a circle made with the thumb and index finger, means you are fine. At a distance, signal OK with a hand on top of the head or both arms forming an O overhead. A pointing finger shows something interesting. Waving one or both arms means you need help, so never wave casually. Keep the signals few enough that you can both remember them under stress.

Snorkeling alone is unsafe, even in shallow water. Tell someone on shore where you plan to swim and when you expect to return. Agree on how far you will go from the entry point and how often you will look up to check each other. A buddy who is watching you is far more useful than one who is busy looking at fish.

A turn-around point

Set a turn-around point before you enter. A simple method is to plan a route you can swim out and back along, and decide that you will turn around once you have used about a third of your planned time or energy, whichever comes first. That leaves time and energy for the swim back and a reserve for surprises such as a current shift or a cramp. Choose landmarks you can recognize, such as a buoy, a rock or a line of anchored boats, so you can judge your position without guessing.

Swim out into any current first, while you still have energy, so the return swim with the current is easier. Turn around early if either of you gets cold, tired or uneasy. Cold water in particular drains energy faster than people expect, and shivering is a sign that it is time to head back. Staying close to shore on a first day is good practice, because it leaves plenty of margin for the swim back.

Final checks at the entry

At the entry point, do one last check. Look at the mask seal, the snorkel connection and the fin straps. Confirm that your buddy has a working mask strap and fins. Put the snorkel in your mouth and breathe through it once while your face is above water to confirm the tube is clear. Place your phone, keys and any valuables in a dry bag or leave them somewhere secure on shore.

Before you go in, make sure you feel well. Avoid alcohol and any medication that causes drowsiness, and eat and drink enough beforehand. If you have a heart condition, asthma, ear problems or a recent illness, speak with a doctor before snorkeling. The checklist does not replace good judgment. If something feels wrong at any point, you can return to shore, and a shorter, comfortable first outing is a better result than a long one you find stressful.