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Life jackets and buoyancy aids
Life jackets and buoyancy aids: the most confused purchase on the water: a 50 N buoyancy aid keeps a conscious swimmer afloat, a 150 N lifejacket turns an…
This launch guide maps the topic, the source base and the practical questions. Check the linked official authority before acting on a rule, deadline, price or safety requirement.
What this guide covers
The most confused purchase on the water: a 50 N buoyancy aid keeps a conscious swimmer afloat, a 150 N lifejacket turns an unconscious one face up, and the shop sells them side by side.
Item pages take each performance level (50, 100, 150, 275 N) with what it assumes about clothing and consciousness, sizing by body weight and chest, children's jackets and why a crotch strap is not optional, automatic against manual inflation, firing-head types and their service interval, an annual self-check, lights and spray hoods, jackets for paddling, ice fishing and sailing, the legal duty to carry them in Estonian and Finnish boats, and UV damage in storage. ~14 pages.
How to use it
Use Life jackets and buoyancy aids to understand the inputs, units and assumptions before relying on an output. A useful result should be reproducible from the named source rather than presented as an unexplained score.
The page keeps the main question, its evidence base and its limits together in one canonical place. That makes it useful as a quick orientation and avoids splitting a broad subject into shallow pages before each narrower answer has enough verified material of its own.
Search vocabulary in four languages
Terminology changes across borders. These are example phrases people use for the same subject in Estonian, Finnish, Russian and English; they are included as a practical vocabulary aid, not as hidden keywords.
| Language | Example phrase |
|---|---|
| Estonian | päästevest ujuvusabivahend vahe |
| Finnish | pelastusliivi vai kelluntapukine |
| Russian | спасательный жилет ньютоны как выбрать |
| English | 50N vs 150N life jacket difference |
Evidence and provenance
The evidence map below records the primary, official or openly licensed material chosen for this guide. It is deliberately visible so a reader can tell the difference between a rule published by an authority, a measured dataset and an editorial explanation.
Source: EN ISO 12402 performance level scope abstracts, Estonian small-craft safety requirements (Riigi Teataja, official), vesiliikennelaki 782/2019 (Finlex, official), national rescue service published guidance (cited), published cold-water immersion research. · checked 2026-09-09
Source names are preserved even where an authority changes its web address. No figure is added to this launch page unless it is already present in the cited source description or can be computed from a named dataset.
Scope and boundaries
cold-water shock and rescue technique stay on /firstaid; this is the equipment and the legal requirement.
Connected TempoLife guides
The following paths are the intentional hand-offs named in the brief. They keep adjacent subjects separate while making the next useful reference easy to find.
Beaches
Continue to the related TempoLife reference.
Fishing
Continue to the related TempoLife reference.
Why it belongs on TempoLife
/beaches, /fishing, /outdoors, /firstaid.
Frequently asked questions
What does this guide cover?
The most confused purchase on the water: a 50 N buoyancy aid keeps a conscious swimmer afloat, a 150 N lifejacket turns an unconscious one face up, and the shop sells them side by side. Item pages take each performance level (50, 100, 150, 275 N) with what it assumes about clothing and consciousness, sizing by body weight and chest, children's jackets and why a crotch strap is not optional, automatic against manual inflation, firing-head types and their service interval, an annual self-check, lights and spray…
What evidence does it use?
EN ISO 12402 performance level scope abstracts, Estonian small-craft safety requirements (Riigi Teataja, official), vesiliikennelaki 782/2019 (Finlex, official), national rescue service published guidance (cited), published cold-water immersion research.
Where does this guide stop?
cold-water shock and rescue technique stay on /firstaid; this is the equipment and the legal requirement.
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