Life Raft Types, Selection, and Carriage
Choosing and mounting the right life raft is a decision you make once — and it has to be right when everything else has gone wrong.
Coastal vs Offshore Life Rafts — Understanding the Categories
The life raft market divides broadly into coastal and offshore categories, and the distinction is not marketing — it reflects fundamentally different design philosophies, construction standards, and survival equipment. A coastal raft is designed for situations where rescue is expected within hours: you're near shipping lanes, within helicopter range, and in waters where hypothermia is a concern but extended drift survival is not. An offshore raft assumes you may be on your own for days or even weeks, and it's built and equipped accordingly.
Coastal rafts — such as the Switlik Coastal and the Zodiac Coastal series — are lighter, less expensive, and pack smaller. They typically feature a single-tube main chamber (though better models have two independent chambers), a basic canopy for weather protection, and a minimal equipment pack: perhaps a bailer, a sea anchor, a few paddles, and some basic signaling gear. They are appropriate for protected waters, day sailing within sight of shore, and areas with reliable Coast Guard coverage. Their lighter weight makes them attractive for smaller boats where every pound matters.
Offshore rafts are a different animal entirely. Models like the Viking RescYou Pro, Winslow Super-Light Offshore, and Zodiac Open Sea feature dual independent buoyancy chambers (so the raft stays afloat even if one chamber is punctured), insulated floors to reduce hypothermia risk, self-erecting canopies with rain catchment, boarding ramps for pulling crew from the water, and comprehensive survival equipment packs. The construction uses heavier-duty fabric with UV-resistant coatings and stronger seam welds. These rafts are significantly heavier (a 6-person offshore raft typically weighs 65-100 lbs depending on manufacturer and pack level) and more expensive, but they are what you need when the nearest rescue may be days away.
ISAF (now World Sailing) Offshore Special Regulations and ORC (Offshore Racing Congress) rules specify exactly which raft categories are acceptable for different race categories. Category 0 and Category 1 races — transocean and long offshore — require an ISAF-approved life raft with a grab bag containing specific survival items. Category 2 races (shorter offshore) allow somewhat less stringent requirements but still mandate offshore-grade rafts. Category 3 and 4 (coastal races) may accept coastal rafts depending on the organizing authority. If you race offshore, your raft must appear on the World Sailing list of approved life rafts, which is updated periodically. A perfectly good raft that isn't on the list won't pass inspection.
For the cruising sailor who doesn't race but ventures offshore, the ISAF standards serve as an excellent benchmark even if compliance isn't mandatory. A raft that meets ISAF requirements has been independently tested to inflate reliably, remain stable in heavy seas, and support its rated capacity in realistic survival conditions. The testing includes inflation at -15°C, stability in simulated storm conditions, and equipment pack verification. Choosing an ISAF-approved raft gives you confidence that an independent body has verified the manufacturer's claims.
Even if you only sail coastal waters, consider an offshore-rated raft if your boat is large enough to carry one. The dual buoyancy chambers alone are worth the weight and cost premium — a single-chamber coastal raft with a puncture becomes a deflating collection of fabric in the water. The redundancy of two independent chambers is the single most important safety feature separating offshore from coastal designs.
Canister vs Valise Stowage — Mounting and Accessibility
Life rafts come packaged in two forms: a rigid fiberglass canister designed for deck mounting, or a soft valise (bag) designed for stowage in a cockpit locker or lazarette. Each has distinct advantages and serious tradeoffs, and your choice depends on your boat's deck layout, stowage options, and how you plan to deploy the raft in an emergency.
Canister-mounted rafts sit on deck in a fiberglass container, typically secured in a stainless steel or aluminum cradle with a hydrostatic release unit (HRU) and a manual release mechanism. The enormous advantage of a canister mount is automatic deployment — if the boat sinks rapidly and the crew cannot manually deploy the raft, the HRU activates at a depth of approximately 1.5-4 meters (depending on model), releasing the canister. As the canister floats free, the painter line pulls taut and triggers inflation. The raft deploys itself without any human action. This is the SOLAS-required configuration for commercial vessels, and it's the gold standard for offshore sailing.
The painter line is the critical link between automatic deployment and actual survival. The painter is a strong line (typically 30+ meters) that serves dual purposes: first, it triggers inflation when pulled taut as the canister separates from the sinking vessel; second, it keeps the inflated raft tethered to the vessel (or the sinking location) until the crew deliberately cuts it. The painter must be properly routed from the raft canister, through the HRU assembly, and secured to a strong point on the vessel — not to the cradle itself, which may break away. Check the painter routing every time you inspect the raft mount. A painter that's been rerouted incorrectly after servicing will prevent automatic inflation.
Valise rafts are stored below decks or in cockpit lockers, and they require manual deployment — someone must physically carry the bag to the deck, attach the painter to a strong point, and throw the raft overboard before pulling the painter to inflate. The advantage is that the raft is protected from UV exposure, spray, and deck wash, which extends its service life. Valise rafts also leave valuable deck space clear for sail handling. The serious disadvantage is obvious: if the crew is incapacitated or the boat sinks faster than the crew can retrieve the raft, the valise goes down with the ship.
For most offshore cruising and racing sailboats, canister mounting is strongly preferred. The raft should be mounted on the cabin top or in the cockpit where it can be reached without going forward, with the cradle through-bolted to the deck (not just screwed down), and the HRU and painter properly configured. Valise stowage is acceptable for coastal sailing where rapid sinking is less likely, and for boats where deck space genuinely cannot accommodate a canister. If you do store a valise raft below, keep it in the most accessible location possible — the cockpit locker closest to the companionway, never buried under other gear.
Never lash a canister raft to the deck with extra lines or bungees 'for security.' This defeats the entire purpose of the HRU automatic release system. If the boat sinks, those extra lashings will hold the raft down with the vessel. The cradle and HRU are engineered to hold the canister securely in normal conditions and release it in an emergency. If the canister seems loose in the cradle, the cradle needs adjustment — not additional lashing.
Major Manufacturers and Model Selection
The life raft market is dominated by a handful of manufacturers who have earned their reputations through decades of SOLAS compliance, real-world deployment, and rigorous testing. Your choice of manufacturer matters more than most gear decisions because this is equipment you buy once, service periodically, and hope never to use — so you need absolute confidence in the product when the moment arrives.
Viking Life-Saving Equipment is the world's largest life raft manufacturer, producing rafts for both commercial (SOLAS) and recreational markets. Their RescYou Pro line is the standard by which offshore recreational rafts are measured. It's ISAF-approved, features dual independent buoyancy chambers, a self-erecting canopy, insulated floor, and an extensive equipment pack. Viking's global service station network is unmatched — critical for cruisers who need servicing abroad. The RescYou Pro is not the lightest raft available (a 6-person canister weighs approximately 75 lbs), but it is arguably the most thoroughly tested and widely serviced.
Winslow Life Raft Company is an American manufacturer that has built its reputation on lightweight offshore rafts for the racing and performance cruising market. The Winslow Super-Light Offshore Plus is a favorite among ocean racers — it's ISAF-approved, significantly lighter than comparable Viking or Zodiac rafts (a 4-person Super-Light canister weighs around 44 lbs), and packs smaller. Winslow achieves this weight savings through advanced fabric technology and careful design optimization. The tradeoff is higher cost per person-capacity and fewer international service stations compared to Viking.
Switlik produces both military and recreational life rafts from their New Jersey facility. Their Coastal and Offshore lines offer solid construction at competitive prices. Switlik rafts are common on U.S. East Coast boats and are well-supported by domestic service stations. The Zodiac (now Zodiac Milpro) brand carries decades of inflatable boat expertise into their life raft line, with the Open Sea and Coastal models offering reliable performance. Zodiac rafts are particularly common on European-built boats.
When selecting a raft, the key factors beyond manufacturer reputation are: rated capacity (always buy at least one size larger than your typical crew — a 4-person raft for 2-3 crew, a 6-person for 4-5), packed weight (can you and one crew member lift it over the lifelines?), canister dimensions (will it fit your deck cradle location?), and equipment pack level. A raft rated for 6 persons that weighs 110 lbs is useless if your crew can't physically deploy it. For couples cruising on boats under 40 feet, a 4-person raft is often the right choice — it gives two people room to move, store supplies, and survive in reasonable comfort.
When comparing raft weights, check whether the manufacturer's stated weight includes the canister or valise and the equipment pack, or just the raft fabric and inflation system. Some manufacturers quote the bare raft weight, making their product look lighter on paper. Always compare fully packed canister weights — that's what you'll be lifting, storing, and deploying.
SOLAS vs ISAF Equipment Packs — What's Inside
The equipment packed inside your life raft can make the difference between survival and tragedy during an extended drift. Two standards govern raft equipment packs: SOLAS (Safety of Life at Sea) packs for commercial vessels and ISAF/World Sailing specifications for racing yachts. Understanding what's in each helps you evaluate what your raft provides and what additional survival gear you need in a separate grab bag (also called a ditch bag).
SOLAS A-Pack is the most comprehensive standard equipment pack, required on commercial vessels operating in unlimited waters. It includes: a buoyant rescue quoit with 30m line, a buoyant knife, two sponges, a sea anchor with swivel and trip line, two paddles, a tin opener, a first-aid kit, a whistle, four parachute flares, six hand flares, two buoyant smoke signals, an electric torch (waterproof), a radar reflector, a signaling mirror, a fishing kit, food rations (minimum 10,000 kJ per person), water (1.5 liters per person), graduated drinking cups, anti-seasickness tablets, survival instructions, and a thermal protective aid for each person the raft is rated for. That's a substantial amount of equipment, and it adds significant weight and bulk to the raft.
SOLAS B-Pack is a reduced equipment pack for vessels operating in warm-water or near-shore routes. It eliminates some items like the food rations, water, fishing kit, and thermal protective aids, resulting in a lighter and smaller pack. Many recreational offshore rafts come standard with a SOLAS B-equivalent pack, with the option to upgrade to an A-pack or ISAF-specific pack.
ISAF/World Sailing race requirements take a different approach. Rather than specifying what's inside the raft, ISAF requires that the raft meet specific construction and performance standards and that the crew carry a separate grab bag containing specified survival items. The grab bag typically must include: a waterproof handheld VHF radio, an EPIRB or PLB, flares (parachute and hand-held), a knife, a signaling mirror, a waterproof flashlight with spare batteries, water and high-energy food, seasickness tablets, and sunscreen. The logic is that a grab bag can be customized, updated, and inspected independently of the raft servicing cycle.
For the well-prepared cruising sailor, the approach should be both: a raft with at least a SOLAS B-equivalent internal pack, plus a separate grab bag stored in an accessible location near the companionway. The grab bag lets you supplement the raft's equipment with personalized items — prescription medications, an additional handheld GPS, extra water, a personal EPIRB/PLB for each crew member, and specific items for your sailing area (extra sun protection for tropical passages, extra thermal protection for cold waters). Treat the raft's internal equipment as the minimum baseline and the grab bag as your personalized survival upgrade.
Review your raft's equipment pack contents after every professional service. The service station will replace expired items (flares, food, water, batteries) but may substitute different brands or quantities. Verify the contents list against the service certificate and ensure nothing was overlooked. Some items — like the fishing kit or signaling mirror — may be removed during inspection and accidentally not repacked.
Hydrostatic Release Units and Painter Line Configuration
The hydrostatic release unit (HRU) is the mechanism that enables automatic life raft deployment if the vessel sinks. It's a small, relatively inexpensive device that sits between the raft canister and the deck cradle, and its proper function is absolutely critical. If the HRU fails, a canister-mounted raft will ride the sinking vessel to the bottom. Understanding how HRUs work, how to inspect them, and when to replace them is non-negotiable for any vessel carrying a canister-mounted raft.
The most widely used HRU in the recreational market is the Hammar H20, which uses water pressure to activate a spring-loaded blade that cuts the retaining strap holding the canister in the cradle. At a depth of approximately 1.5 to 4 meters (depending on model), water enters a pressure chamber, overcomes the spring tension, and the blade fires — slicing through the strap and freeing the canister. The canister floats to the surface, and the painter line (which is attached to a strong point on the vessel, not to the cradle) pulls taut and triggers inflation. The entire sequence is passive and mechanical — no batteries, no electronics, no human input required.
HRU replacement is mandatory every 2 years, regardless of whether the unit has been activated. The Hammar H20 has an expiration date stamped on its body, and marine surveyors and race inspectors will check this date. An expired HRU is a failed safety inspection. Replacement is straightforward — the unit is held in place with a single bolt and a retaining strap — but the painter line routing must be verified every time the HRU is replaced. The most common installation error is routing the painter through the HRU mechanism instead of around it, which prevents the painter from deploying correctly when the canister is released.
Painter line length matters more than most owners realize. The painter must be long enough to reach from the raft's stowage position to the water surface even as the vessel sinks, plus enough additional length to allow the raft to inflate and float clear of the vessel. Most manufacturers provide a painter of 20-30 meters. The bitter end of the painter must be secured to a dedicated strong point — a through-bolted padeye or U-bolt rated for the loads involved. Do not attach the painter to the cradle, to a stanchion, or to a lifeline. These may tear free under load, leaving the raft inflated but untethered — or worse, failing before the painter tension triggers inflation.
Test your raft's deployment pathway at least annually, without actually deploying the raft. Verify that the canister can slide freely out of the cradle (no corrosion binding the cradle, no gear stacked against the canister), that the HRU is within its service date, that the painter is not chafed or UV-degraded, and that the painter's attachment point to the vessel is secure and corrosion-free. Walk through the manual deployment procedure in your mind and with your crew: release the cradle latch, push/lift the canister over the side, pull the painter to inflate, board the raft, cut the painter only when ready to drift free. This mental rehearsal costs nothing and could save your life.
Tools & Materials
- Stainless steel wire cutters
- Adjustable wrench
- Replacement Hammar H20 HRU
- Marine-grade anti-seize compound
- UV-resistant cable ties
Summary
Offshore life rafts with dual independent buoyancy chambers are strongly preferred for any sailing beyond coastal waters — a single-chamber raft with a puncture offers no flotation.
Canister deck mounting with a properly configured hydrostatic release unit (HRU) enables automatic deployment if the vessel sinks before crew can act — the HRU must be replaced every 2 years.
Choose a raft rated for at least one size larger than your typical crew to allow room for movement, gear storage, and survival comfort in the raft.
The painter line must be secured to a through-bolted strong point on the vessel, not to the cradle or stanchion — incorrect painter routing is the most common installation error.
Carry a separate grab bag to supplement the raft's internal equipment pack with personalized survival items including handheld VHF, PLB, medications, and extra water.
ISAF/World Sailing approved rafts have been independently tested for inflation reliability, stability, and equipment completeness — use the approved list as your minimum standard even if you don't race.
Key Terms
- Hydrostatic Release Unit (HRU)
- A pressure-activated mechanical device that automatically releases a life raft canister from its deck cradle when submerged to a specific depth (typically 1.5-4 meters). Must be replaced every 2 years regardless of activation.
- Painter Line
- A strong line (typically 20-30 meters) connecting the life raft to the vessel. Serves dual purpose: triggers raft inflation when pulled taut during deployment, and keeps the inflated raft tethered to the vessel until deliberately cut.
- SOLAS A-Pack
- The most comprehensive life raft equipment pack standard, required on commercial vessels in unlimited waters. Includes food, water, flares, first aid, thermal protection, fishing kit, and signaling equipment for each person the raft is rated for.
- Grab Bag (Ditch Bag)
- A pre-packed waterproof bag stored near the companionway containing survival equipment to supplement the life raft's internal pack. Typically includes handheld VHF, PLB/EPIRB, flares, water, food, and medications.
- ISAF-Approved Raft
- A life raft that appears on the World Sailing (formerly ISAF) list of approved life rafts, indicating it has passed independent testing for inflation reliability, stability, and equipment completeness under simulated emergency conditions.
- Valise
- A soft bag packaging option for life rafts, designed for below-deck or locker stowage. Lighter and more protected from UV than canister mounting, but requires manual deployment and cannot use an HRU for automatic release.