BLOCK ISLAND 40 (MIGRATOR)
Specifications
Hull
| LOA | 40.75 ft |
| LWL | 28 ft |
| Beam | 11 ft |
| Draft | 8.82 ft/ 4.17 ft min |
| Displacement | 20,000 lb |
| Ballast | 7,800 lb |
| Hull speed1.34·√LWL | 7.1 kn |
Rig & Sails
| Iforetriangle height | 46.8 ft |
| Jforetriangle base | 15.58 ft |
| Pmainsail luff | 39.5 ft |
| Emainsail foot | 15 ft |
| PYmizzen luff | 20.5 ft |
| EYmizzen foot | 7.25 ft |
| FLforestay | 15.6 ft |
| Mainsail | 684.5 sq ft |
| Jib (100%) | 364.6 sq ft |
| Spinnaker | 619.8 sq ft |
About the BLOCK ISLAND 40 (MIGRATOR)
The BLOCK ISLAND 40 was first introduced in 1957. This particular 'revival' of the design began around 1984. How many of this later version have been built is unknown. Migrator Yachts, Inc. 72 Sandwich Rd. Rte. 6 Wareham, MA 02571
Designed by William Tripp Jr. and built by Migrator Yachts, Inc. in the USA, the Block Island 40 (Migrator) was produced in 1984. This heavy-displacement yawl offers a robust platform for serious cruising, characterized by its 20000.0 lb displacement and 7800.0 lb ballast, though the exact total hulls built remains unconfirmed in available records.
- Best for:
- This boat is best suited for experienced coastal cruisers and bluewater adventurers who prioritize seaworthiness and comfort over speed, particularly those willing to manage the maintenance demands of a balsa-cored deck and complex rudder systems.
- Bluewater capability:
- With a D/L ratio of 406.73, a capsize ratio of 1.62, and a full/long keel, the boat exhibits excellent stability and seaworthiness for offshore passages, though its performance is moderated by a moderate SA/D ratio of 16.04.
- Comparables:
- Comparable vessels include the Island Packet 40 and the Cal 40, as they share similar heavy-displacement characteristics, full keel designs, and a focus on safe, comfortable offshore passage-making rather than high-performance racing.
Performance
ORC Performance Data(1 certificate)
Measured performance data from ORC (Offshore Racing Congress) certificates.
Polar Diagram
Boat speed (kn) vs. true wind angle. Source: ORC
Racing Ratings
Triple Number
ORC Measured
Sail Areas (ORC)
Speed Table (kn)
| TWA \ TWS | 4 | 6 | 8 | 10 | 12 | 14 | 16 | 20 | 24 |
|---|---|---|---|---|---|---|---|---|---|
| 52° | 4.2 | 5.4 | 6.2 | 6.5 | 6.6 | 6.7 | 6.7 | 6.8 | 6.8 |
| 60° | 4.3 | 5.6 | 6.3 | 6.7 | 6.8 | 6.9 | 6.9 | 7.0 | 7.0 |
| 75° | 4.5 | 5.8 | 6.5 | 6.8 | 7.0 | 7.1 | 7.2 | 7.3 | 7.3 |
| 90° | 4.3 | 5.7 | 6.4 | 6.9 | 7.1 | 7.3 | 7.4 | 7.5 | 7.7 |
| 110° | 4.2 | 5.6 | 6.5 | 7.0 | 7.2 | 7.4 | 7.5 | 7.7 | 7.9 |
| 120° | 4.0 | 5.4 | 6.4 | 7.0 | 7.3 | 7.5 | 7.7 | 8.0 | 8.0 |
| 135° | 3.6 | 4.9 | 6.0 | 6.7 | 7.1 | 7.4 | 7.7 | 8.3 | 8.7 |
| 150° | 3.0 | 4.3 | 5.3 | 6.2 | 6.8 | 7.2 | 7.5 | 8.0 | 8.7 |
| Beat VMG | 2.8 | 3.7 | 4.3 | 4.5 | 4.7 | 4.7 | 4.7 | 4.8 | 4.7 |
| Run VMG | 2.6 | 3.7 | 4.6 | 5.4 | 6.0 | 6.6 | 7.0 | 7.6 | 8.1 |
Pricing
We don't have market pricing data for the BLOCK ISLAND 40 (MIGRATOR) yet. If you own one, help other buyers — what did you pay for it? Reports build a community price estimate over time.
Estimated Cost of Ownership
Based on 40.75ft LOA. Actual costs vary by condition, usage, and local rates.
Known Issues & Pre-Purchase Inspection
20 reported issues across 9 systems for the BLOCK ISLAND 40 (MIGRATOR), compiled from owner reports in sailing forums and owner-association material.
Unlock the full inspection report
Thinking of buying a BLOCK ISLAND 40 (MIGRATOR)? This is an in-depth report on the faults this model is known for — so you know exactly what to check when you walk the boat. For the price of a coffee.
- ✓ All 20 specific issues — severity, symptoms & fixes
- ✓ Model-specific pre-purchase inspection checklist
- ✓ Downloadable PDF to take to your surveyor — yours to keep
One-time $2.99 · secure checkout by Stripe · instant access · 30 days online, PDF yours to keep
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Which engine powers your BLOCK ISLAND 40 (MIGRATOR)?
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Brands sometimes mentioned for this model: Yanmar, Westerbeke, Perkins — is it one of these?
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Used sails that fit the BLOCK ISLAND 40 (MIGRATOR)
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