Did you know the Korea Coast Guard operates each year from May to September 'Maritime safety intensive patrol·guidance period' as a fact, did you know?
During this period, the largest proportion of anglers' safety accidents is neither falling nor drowning, but 'hypothermia' The May night sea often has a diurnal temperature swing over 10°C, and people lightly dressed in the warm midday sun lose body heat in the early morning, leading to accidents.
Today, the five most common accident patterns in May night fishing and a checklist you can review in five minutes before the trip.
01Why hypothermia accidents increase in May
May is the first month anglers shed their 'winter clothes'. Spring midday temperatures exceed 20°C, but the perceived temperature over the sea between dawn and 5 a.m. drops to 5~8°C.
Two more variables are added here.
First, wind. In a wind speed 5 m/s environment, perceived temperature is 4–7°C lower than actual temperature (based on KMA wind chill formula). Considering the May coastal average wind speed of 4–6 m/s, a perceived 5°C is effectively mid-winter level.
Second, wet clothing. The US Army Cold Weather Manual notes that when clothing gets wet during night fishing, heat loss speed increases 25 times. Rocky shore waves, boat spray, dawn dew — in May nights there is 'no way to stay dry' environment.
If these two variables combine, finger dexterity dulls within an hour, judgment clouds after two hours. Accidents usually happen then.
Mild hypothermia warning signs that laypeople don't know
- Fingers become numb and the rig keeps tangling
- Talking more than usual, or conversely becoming suddenly quiet
- Shivering stops(← The most dangerous sign. When shivering stops, it means the body has reached its limit)
- Familiar rig knot won't hold
- Among the above four two or more simultaneously if they appear stop the fishing trip immediately.
- Change into dry clothes and consume a warm drink.
- If not recovered within 30 minutes, call 119.
02Fishing trip 5‑minute pre‑departure checklist
The five items below can be checked in front of the tackle box within five minutes before departure. Only the key points for each item are listed.
① One step warmer
For May nights, dress 'one step below mid‑winter' for safety. The standard is a spring jacket + fleece liner + wind‑proof outer layer, three layers total.
② Add one set of dry clothing
One set of dry clothes to change into at the tackle box or vehicle. One set above plus one pair of socks prevent accidents.
③ Warm water and sugars
Lukewarm water in a thermos + candy or chocolate. If early hypothermia signs appear, consume within five minutes. Alcohol has the opposite effect— It may feel temporarily warm, but vasodilation accelerates heat loss.
④ Companion or share your location
Night fishing alone is dangerous. If you have no companion, share the fishing spot and expected return time with family or friends. Promise to have them contact you if no response within 30 minutes.
⑤ Always wear a life jacket
Korea Coast Guard data shows that over 60% of May night fall accidents involved not wearing a life jacket. At night, it takes longer to locate a fall victim and hypothermia accelerates.
03Summary
May night fishing = 'season is spring, sea is mid‑winter'. One step warmer clothing, one set of dry clothes, one companion — having just these three can prevent 90% of accidents.
Next info post: 'Rocky shore vs boat, why May night safety differs'— Scheduled for publication next week.
Check once more before the trip, and fish safely.