Design and Construction
Lefeber's trawler-derived form produced a beamy, substantial cruiser: the Banjer 37 measures 36 ft 6 in overall with an 11 ft 6 in beam and a 33 ft waterline, displacing about 26,880 lb. The long keel draws just 4 ft 7 in, a shallow enough draft that she can tuck into modest marinas, and the solid GRP hull carries a minimum 0.5-inch thickness under Lloyd's build rules. Period reviews judged the build quality excellent, and the wetted surface runs about 398 ft². With a displacement-length ratio near 314, she sits firmly in the heavy-cruiser class, and her ballast ratio of roughly 33 percent (around 8,800 lb of iron) gives a comfort ratio in the mid-40s — a sedate, steady platform rather than a lively racer.
Rig and Handling
The standard boat is a ketch carrying about 450 sq ft of sail, a small rig that period testers said made her more of a motorboat with sails than a yacht; a Bermudian-rig option nearly doubled that to 805 sq ft and shifted the balance closer to a 50/50 motorsailer. The sail-area-to-displacement ratio sits at 9.46, confirming the modest canvas. Sheet spec is uniform: jib and genoa sheets run 36.5 ft at 14 mm, the mainsheet 91.3 ft, and spinnaker gear 80.3 ft, all 14 mm diameter. Under power, a DAF diesel of 85 hp, a 72 hp Perkins 4-236, and a 120 hp unit elsewhere appear in the records, so fitted output varies by individual boat. The theoretical hull speed is 7.8 knots with a measured max near 8.0.
Seakeeping and Stability
Stability numbers paint a forgiving picture for offshore use. The capsize screening value is 1.53 and the calculated angle of vanishing stability is about 65 degrees, while the motion comfort ratio reaches 46.1. The immersion rate is steep — roughly 1,333 lb per inch — reflecting the mass behind the hull. These figures, combined with the trawler bow and long keel, explain why reviewers felt the GRP hull could battle through anything the North Sea might offer.
Accommodations
Below, the Banjer 37 is fitted out in teak and sleeps up to seven across berths arranged for cruising. The interior volume follows the beamy hull, and the motorsailer profile gives standing headroom and a saloon suited to extended living aboard. The shallow draft and heavy displacement make her a stable household at anchor.
The Verdict
The Banjer 37 is a purpose-built motorsailer with trawler heritage: heavily built, shallow-drafted, and stable, with a teak interior that accommodates a family or charter crew. She is no light-air sprinter, but her construction and numbers suit long-range cruising in rough water.
Pros
- Lloyd's-spec solid GRP hull with 0.5-inch minimum thickness and excellent period build rating
- Shallow 4 ft 7 in long-keel draft eases marina access
- High stability (AVS ~65°, comfort ratio 46.1) and trawler bows for heavy weather
- Teak interior with up to seven berths
Cons
- Standard ketch rig leaves her sail-light; reliant on engine
- Disputed engine power across sources (72–120 hp recorded)
- Heavy displacement limits speed to ~8 knots max
