01Life Jacket – Why It’s Essential
Life jackets provide buoyancy by increasing surface area when immersed. A jacket with sufficient buoyancy helps keep an average adult reliably afloat.
Jackets with insufficient buoyancy dramatically increase the risk of sinking in rapid currents or heavy waves.
- Higher buoyancy → more stable flotation in water
- Jacket weight ≤ 1.2 kg → Minimizes fatigue during prolonged wear
- Reflective strips ≥ 2 → Ensures visibility at night or in fog
When selecting, prioritize ‘Adjustable’ straps and a ‘Full‑body’ style. Adjustable straps help maintain buoyancy as body shape changes, and a full‑body cover prevents rapid weight gain when soaked.
Before wearing, conduct a buoyancy test (float in water) to verify that actual buoyancy matches the stated value.
02Anti‑slip Footwear – The First Line of Defense for Your Feet
Rocky shores become extremely slippery with waves and currents. Harder soles tend to offer more friction than typical rock surfaces.
A properly firm sole can reduce the risk of slipping even on rainy or highly tidal days.
- Sole material: rubber·synthetic rubber (firm, high-friction compound)
- Ankle secure: Velcro or laced (tightening force ≥ 30 N)
- Waterproofing: ≥ 5 mm waterproof membrane applied
When choosing shoes, evaluate both ‘ankle retention’ and ‘sole friction surface’. Insufficient ankle retention can cause the foot to be swept into the water, and a weak friction surface can lead to slipping on rocks and increased injury risk.
Before actual use, submerge and perform a slip test to confirm that friction increases sufficiently.
03Escape Route Design – Secure a Safe Zone Within 30 m in Emergencies
If you fall into the water, the most critical factor alongside a floating jacket is the ‘escape route’. Identifying a nearby safe exit point (e.g., beach, buoy, vessel) in advance can shorten the time it takes to get help.
The closer the exit point, the faster rescue can happen.
- Escape distance: as close as possible
- Safety point types: beach·buoy·boat·rescue vessel
- Route marking: portable light·reflective tape
When designing the route, consider ‘visibility’ and ‘terrain obstacles’. Use lighting (LED lights) and reflective tape to keep the route clear at night, and place terrain obstacles (rocks, currents) at least 2 m apart.
Additionally, install a ‘emergency call zone’ (portable whistle·satellite messenger) along each segment to enable immediate rescue requests.
- Underestimating Jacket Buoyancy– Low‑grade jackets sink quickly in rapid currents.
- Sole hardness not verified – Wet rocks lose friction dramatically.
- Unmarked escape route – Visibility is poor during night rescues, extending response time.