Automatic Life Jackets
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Automatic life jackets are the most popular choice for sailors. They work by inflating the moment they enter the water for fast, reliable buoyancy. At Force 4 Chandlery, we stock a wide range of automatic life jackets from top safety brands. Trusted by coastal cruisers, offshore sailors and racers alike.
What Is an Automatic Life Jacket?
An automatic lifejacket uses a water‑activated firing mechanism to inflate the bladder when submerged. This gives immediate buoyancy even if you’re injured or unable to pull a manual toggle. Most models use either UML or Hammar systems, each designed for dependable activation in real‑world conditions.
Many of these jackets also include an integrated safety harness. These allow you to clip onto jackstays when moving around the deck.
Choosing the Right Automatic Life Jacket
165N Coastal Cruising — Lightweight, comfortable jackets ideal for day sailing and inshore waters.
170N–190N Offshore — Higher‑buoyancy models often coming with harnesses, lights or sprayhoods for coastal conditions.
275N Ocean Sailing — Maximum lift for heavy waterproofs, tools or demanding offshore passages.
Performance & Racing — Ergonomic fits, slim profiles and high‑visibility features for active sailors.
Accessories & Servicing
Keep your automatic life jacket ready for the season with Re‑arming Kits, Life Jacket Lights, Sprayhoods and Safety Lines & Harnesses.
For manual inflating alternatives, see Manual Life Jackets.
Force 4 Video: Life Jacket Breakdown - What Life Jacket Is Best For You?
Force 4 Video - One of our best ever Lifejacket Offers - Seago 165N - Ideal for coastal sailing
Force 4 Video: How Sensitive are Automatic Lifejackets?
