Design and Construction
The 312's hull is solid GRP, reinforced with stringers and injection moulded, while the deck is a laminated GRP sandwich. The keel is not a bolted-on fin but part of the hull shell itself, filled from the inside with iron ballast and then moulded with resin and laminated over; the published ballast is 2.2 tons against a 4.9-ton displacement, a 45 percent ratio that YACHT described as high and, together with the moderate long keel, made the boat good-natured. A deep V-frame below the waterline lets her enter waves smoothly. All bulkheads and the deck are laminated to the hull, and the mast stands on the main bulkhead on deck with a wooden mast foot behind it; the chainplates are bolted with solid knees laminated to the hull. The yard built the 312 under the constant supervision of an external inspector from Lloyd's Register of Shipping, a detail that underscores the serial-production discipline behind a comparatively small boat.
Rig and Handling
The sail plan was never altered across the model's life: a masthead sloop with 19 m² mainsail and 33 m² furling genoa (45 m² with jib), mast 13.73 m above the water. YACHT found the 312 very good sailing even in light winds, which sets it apart from the sluggish-air reputation some small cruisers carry. The cockpit is compact at 1.95 m long — more than three adults would sit in each other's way for long — but it carries the fixed windscreen that became the yard's trademark early on, and that screen opens in the centre for ventilation at anchor. A large anchor locker sits on the foredeck, and two dorade boxes on the superstructure keep air moving below.
Accommodations
The interior is matte-lacquered mahogany, with Rassy-typical formica surfaces in the galley and navigation area as the only noted visual exception. The saloon is conventional, with longitudinal settees to port and an L-shaped settee to starboard arranged around a large centreline folding table. The galley is to port and practical: the test boat carried a seaworthy double sink, a semi-cardanically suspended gas cooker with oven, and a top-loading fridge, while the waste bin sits forward with a hatch access from the galley.
The Mark I, built until 1986 and recognisable by portlights in the blue hull stripe, came with or without a quarter berth; those without gained an extra cockpit locker to starboard. The Mk II, introduced in 1986, moved the enlarged portlights up into the superstructure, shifted the whole superstructure and cockpit aft for a few extra centimetres in the saloon, and raised the coachroof — headroom went from 1.83 m to 1.85 m by the builder's measure, with YACHT citing 1.87 m in the Mk II saloon. The Mk II made the quarter berth standard, separated the toilet compartment from the full-beam arrangement of the earlier boat, and fitted a shower basin into that new private wet room, with waste water channelled into a one-metre-deep bilge sump. A dog bunk attached to the navigation area became standard on Mk II boats after being an extra only. Forward berth length varied from 200 cm in the oldest to 190 cm in the latest. In 1980 YACHT judged the layout comfortably sailed by a crew of four with occasional guests.
Known Issues
The teak deck was not fully bonded to the substrate and, depending on degree of use, will sooner or later become a problem area not fully bonded teak deck.
The Verdict
The Hallberg-Rassy 312 is a thoughtfully evolved small cruiser whose two-generation run refined the interior without disturbing a well-regarded hull and rig. The integrated keel-within-hull and Lloyd's-supervised build speak to a serious construction standard, and the compact but protected cockpit with opening windscreen remains a defining virtue. The principal watch item is the partially bonded teak deck.
Pros
- High 45 percent ballast ratio with moderate long keel and deep V-frame for smooth, good-natured motion
- Mk II brought separated head with shower, standard quarter berth, and raised headroom
- Well-regarded sailing performance even in light air; practical port-side galley
- Lloyd's-supervised construction; integrated iron-ballast keel within the hull shell
Cons
- Teak deck not fully bonded and prone to eventual problems with use
- Compact 1.95 m cockpit limits seated crew comfort
- Forward berths shrink to 190 cm on later boats
