1973 Islander 37 vs Catalina 315 — Comparison
1973 Islander 37
Catalina 315
Specifications Side by Side
| Specification | 1973 Islander 37 | Catalina 315 |
|---|---|---|
| General | ||
| Manufacturer | Islander | Catalina |
| Year | 1973–1978 | 2014 |
| Type | Sloop | Sloop |
| Country | USA | USA |
| Designer | Alan Gurney | Gerry Douglas |
| Dimensions | ||
| LOA | 11.28 m (37.0 ft) | 9.45 m (31.0 ft) |
| LWL | 8.69 m (28.5 ft) | 8.61 m (28.2 ft) |
| Beam | 3.28 m (10.8 ft) | 3.20 m (10.5 ft) |
| Draft | 1.68 m (5.5 ft) | 1.68 m (5.5 ft) |
| Weight | ||
| Displacement | 6,577 kg (14,500 lbs) | 4,536 kg (10,000 lbs) |
| Ballast | 2,722 kg (6,001 lbs) | 1,814 kg (3,999 lbs) |
| Sailing | ||
| Sail Area | 54.5 m² (587 ft²) | 44.0 m² (474 ft²) |
| Hull Material | Fiberglass | Fiberglass |
| Keel Type | Fin | Fin |
| Engine & Tanks | ||
| Engine | 22 HP | 21 HP |
| Fuel Capacity | 76 L (20.1 gal) | 76 L (20.1 gal) |
| Water Capacity | 114 L (30.1 gal) | 132 L (34.9 gal) |
| Accommodation | ||
| Berths | 6 | 5 |
| Cabins | 2 | 1 |
Performance Comparison
Detailed Comparison
The 1973 Islander 37 and Catalina 315 represent two takes on sloop-rigged sailing. The 1973 Islander 37 is a 1970s design by Islander from USA, while the Catalina 315 is a modern offering from Catalina from USA. The 1973 Islander 37 was penned by Alan Gurney. The Catalina 315 was designed by Gerry Douglas.
In terms of size, the 1973 Islander 37 measures 11.28m (37.0ft) overall with a beam of 3.28m, compared to the Catalina 315 at 9.45m (31.0ft) with a 3.20m beam. The 1973 Islander 37 is 1.83m longer than the Catalina 315. The 1973 Islander 37 displaces approximately 45% more than its counterpart, which significantly affects how each boat handles in different sea states.
Looking at performance, the 1973 Islander 37 has moderate sail power suitable for relaxed cruising with an SA/D ratio of 15.77 and 54.5 m² of sail area. The Catalina 315, with an SA/D of 16.32 and 44.0 m² of canvas, offers moderate sail power suitable for relaxed cruising. The Catalina 315 has the edge in terms of raw sailing performance.
For comfort and safety, the 1973 Islander 37 offers a moderate motion comfort level (comfort ratio: 23.2) and excellent capsize resistance suitable for offshore voyaging (capsize ratio: 0.70). The Catalina 315 has a comfort ratio of 18.9 and a capsize screening value of 0.77. The ballast ratios are 41.4% for the 1973 Islander 37 and 40.0% for the Catalina 315, reflecting their respective approaches to stability.
Below deck, the 1973 Islander 37 provides 6 berths in 2 cabins with 114L of water capacity and 76L of fuel. The Catalina 315 offers 5 berths in 1 cabin with 132L water and 76L fuel capacity.
Verdict
For cruising: The 1973 Islander 37 is the better choice for comfortable cruising thanks to its higher comfort ratio, offering a gentler motion at sea that crews will appreciate on longer passages.
For racing: The Catalina 315 has the performance advantage with its superior SA/D ratio, meaning more sail power relative to its displacement for competitive sailing.
For liveaboard: The 1973 Islander 37 offers more sleeping accommodation, making it better suited for extended living aboard. Consider water and fuel capacity for extended stays away from marinas.
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Or view individual specs: 1973 Islander 37 · Catalina 315