Recommendations for Dinghy, Tender, and Liferaft — Optimized for cost, reliability, and Caribbean use.
Highfield is one of the best "Chinese-origin" brands — built in China to very high standards with 5083 aluminum hulls and Hypalon tubes. The Classic 420 is stiff, stable, and light enough to crane onto your seastead. Paired with the Yamaha Harmo electric outboard, it gives you silent, zero-fuel operation that can be charged directly from the seastead's solar array.
| Length | 13 ft 9 in (4.2m) |
| Weight (hull only) | 187 lbs (85 kg) |
| Yamaha Harmo Motor | ~121 lbs (55 kg) |
| Top Speed (2 people) | ~9–11 knots |
| Cruise Speed | 5–7 knots |
| Estimated Total Cost | $17,800–$19,500 |
The Highfield Patrol 660 (21.7 ft) is a professional-grade RIB designed for rough water. It has a deep-V aluminum hull, excellent stability, and is proven in commercial and military use. Twin 30hp outboards give you redundancy (critical in the Caribbean) while keeping weight and cost reasonable.
This boat can comfortably run 20+ miles at 20+ knots, making it suitable for running ahead to islands, medical evacuation, or using as a storm escape vessel while the seastead is remotely piloted.
| Length | 21 ft 7 in (6.6m) |
| Dry Weight (hull) | ~1,875 lbs (850 kg) |
| Engines | 2 × Yamaha or Suzuki 30hp |
| Top Speed (light) | ~32–35 knots |
| Cruise Speed (6 people) | 20–24 knots |
| Estimated Total Cost | $48,000–$56,000 |
The tender already serves as your primary "lifeboat", so the liferaft is the final backup. We chose the Revere Elite Offshore (not the cheaper Coastal version) because it has a double-wall canopy, better insulation, and a 3-year service interval.
Chinese-made liferafts are significantly cheaper but have questionable long-term reliability and servicing. For a $500–600k seastead, we recommend spending the extra $1,000 on a reputable brand.
| Capacity | 6 persons |
| Canister Weight | ~115–130 lbs (52–59 kg) |
| Type | Offshore (SOLAS-grade materials) |
| Cost (new) | $3,150–$3,750 |