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Quick answers
Which local rescue or training agency should I check first?
Use the local lens: coastguard/federation norms and the shop briefing for that bay — not a blog visibility claim.
When did the Olympics add marathon swimming?
The 10 km open-water event debuted at the 2008 Beijing Games, held at the Shunyi rowing-canoeing park.
Who first swam the English Channel?
Matthew Webb swam Dover to Calais in 1875. The Channel remains the most famous ratifying-body swim, under rules later formalised by the CSA and CLSA.
Are wetsuits allowed in races?
World Aquatics and World Triathlon set temperature bands. Below a threshold wetsuits may be required or permitted; above it they are often banned. Always read the event’s rule sheet.
What is sighting?
Lifting the eyes to pick a landmark or buoy without breaking the stroke. It is the skill that replaces the black line.
Is a pool 1,500 m enough preparation?
It is necessary and not sufficient. Currents, chop, cold and navigation only appear outdoors.
The transferable pool skills are stroke and aerobic base. The new skills are navigation, temperature and exiting a beach or pontoon without a wall.
Organised events mark a course with buoys and cover it with kayaks. Informal swims need a chosen exit, a watcher on land or a tow float, and a decision to stay out if the wind turns.
Steps
- Build pool endurance first
Continuous 1,500–3,000 m with bilateral breathing is the usual indoor prerequisite.
Panic in chop is harder to fix than a slow 100 m split.
- Practise sighting in a pool
Lift the eyes every 6–8 strokes on a painted target. It feels ugly and is the whole outdoor sport.
A front snorkel can isolate the catch, then come off for sighting sets.
- Acclimatise gradually
Short, repeated exposures teach the cold-shock gasp to settle. Do not jump a 10 °C gap in one weekend.
A thermometer and a time limit beat bravado.
- First outdoor session with cover
A club, a kayak, or a lifeguarded beach. Solo first outings are how competent pool swimmers make the incident statistics.
A bright cap and a tow float are visibility, not a buoyancy miracle.
- Learn a two-exit plan
Start and finish points that still work if the wind shifts. Rivers need an even stricter downstream plan.
If the landing is a ladder, practise it in a calm harbour first.
- Race only on a marked course
Buoys, a briefing and cut-off times exist because packs and feeding are chaotic.
Read the event’s wetsuit and temperature sheet the night before.
Skills
- Sighting — A quick forward glance without stopping the kick. Landmarks beat following the bright cap ahead — that cap may be lost.
- Drafting — In races, swimming on hip or feet saves energy and is usually legal. In informal groups it is courtesy, not a tactic.
- Breathing in chop — The “uphill” side of the wave; bilateral breathing gives a choice when one side is a face full of water.
- Entries and exits — Dumping surf, slippery weed and ladders cause more injuries than the swim itself.
- Feeding — On swims over about an hour, a handheld bottle or a coach on a pontoon. Practise swallowing without inhaling.
Progression
- Sheltered 500–1,000 m — A lake or harbour with an obvious beach and a watcher.
- Marked 2–5 km event — The usual first race: buoys, a timing chip, and a cut-off.
- Cold or current venues — Only after warm, flat water feels ordinary.
- Marathon 10 km+ — Feeding, grease or wetsuit policy, and a support plan — a different sport from a Saturday 1 km.
Common mistakes
- First swim alone — Competence in a 25 m hall does not transfer to a rip or a thermocline.
- Ignoring the wind forecast — Offshore wind and a rising swell change the exit. The forecast is part of the kit list.
- Overheating in a wetsuit — Warm-water races ban suits for a reason. Heat stroke is a water-sport problem too.
- Following the pack off course — Drafting a lost group is how entire waves miss a turn buoy.
Open-water technique is sighting plus an exit plan. Distance in a pool is homework, not the event.