Design and Construction
The 312 has a solid, injection-moulded GRP hull reinforced with stringers, while the deck is a laminated GRP sandwich. Its keel isn’t a bolted-on fin but part of the hull shell itself. The keel cavity was filled from inside with iron ballast, then moulded with resin and laminated over.
Published ballast is 2.2 tons against a displacement of 4.9 tons, giving a 45 percent ratio. YACHT described that figure as high and found that, together with the moderate long keel, it made the boat good-natured. A deep V-frame below the waterline allows the hull to enter waves smoothly.
All bulkheads and the deck are laminated to the hull. The deck-stepped mast stands on the main bulkhead, with a wooden mast foot behind it, while the chainplates are bolted to solid knees laminated into the hull. The yard built the 312 under the constant supervision of an external inspector from Lloyd’s Register of Shipping, underscoring the discipline behind the boat’s series production.
Rig and Handling
The sail plan remained unchanged throughout the model’s production run. The 312 carries a masthead sloop rig with a 19 m² mainsail and a 33 m² furling genoa, or 45 m² with jib. The mast rises 13.73 m above the water.
YACHT found the 312 very good sailing even in light winds, setting it apart from the sluggish performance in light air associated with some small cruisers.
At 1.95 m long, the cockpit is compact; more than three adults would get in one another’s way if seated there for long. It does, however, have the fixed windscreen that became an early Hallberg-Rassy trademark. The screen opens in the centre to provide ventilation at anchor. A large anchor locker occupies the foredeck, and two dorade boxes on the superstructure help keep air moving below.
Accommodations
The interior is finished in matte-lacquered mahogany. Rassy-typical Formica surfaces in the galley and navigation area are the only noted visual exception.
The saloon follows a conventional arrangement, with a longitudinal settee to port and an L-shaped settee to starboard around a large, centreline folding table. The practical galley is to port. The test boat carried a seaworthy double sink, a semi-cardanically suspended gas cooker with oven, and a top-loading fridge. A waste bin sits forward, with hatch access from the galley.
In 1980, YACHT judged the layout comfortable for a sailing crew of four, with room for occasional guests.
Mark I and Mk II
The Mark I was built until 1986 and can be recognised by its portlights in the blue hull stripe. It was available with or without a quarter berth; boats without one gained an additional cockpit locker to starboard.
Introduced in 1986, the Mk II moved enlarged portlights into the superstructure. The yard also shifted the entire superstructure and cockpit aft, gaining a few extra centimetres in the saloon, and raised the coachroof. By the builder’s measurement, headroom increased from 1.83 m to 1.85 m, while YACHT cited 1.87 m in the Mk II saloon.
The Mk II made the quarter berth standard. A dog bunk connected to the navigation area also became standard after previously being available only as an extra. The toilet compartment was separated from the earlier boat’s full-beam arrangement, creating a private wet room with a shower basin. Waste water drains into a one-metre-deep bilge sump.
Forward-berth length varied over the production run, from 200 cm in the oldest boats to 190 cm in the latest.
Known Issues
The teak deck wasn’t fully bonded to the substrate. Depending on how heavily the boat has been used, this not fully bonded teak deck will sooner or later become a problem area.
Verdict
The Hallberg-Rassy 312 is a thoughtfully evolved small cruiser. Its two-generation production run refined the interior without disturbing its well-regarded hull and rig. The integrated keel and Lloyd’s-supervised construction reflect a serious build standard, while the compact but sheltered cockpit and opening windscreen remain defining virtues. The principal concern is the partially bonded teak deck.
Pros
- High 45 percent ballast ratio, moderate long keel, and deep V-frame contribute to smooth, good-natured motion
- Mk II added a separate head with shower, a standard quarter berth, and greater headroom
- Well-regarded sailing performance, even in light air
- Practical port-side galley
- Construction supervised by Lloyd’s Register of Shipping
- Integrated iron-ballast keel within the hull shell
Cons
- Teak deck isn’t fully bonded and is prone to eventual problems with use
- Compact 1.95 m cockpit limits seated comfort for larger crews
- Forward berths shortened to 190 cm on later boats
