SEAKEEPER RIDE SEA TRIAL REPORT
Vessel Characteristics
| Boat Make | NorthCoast Boats |
| Boat Model | 255HT |
| Boat Year | 2026 |
| System | Seakeeper Ride 450 |
| Length Overall | 31 ft. 2 in. |
| Beam Overall | 9 ft. 5 in. |
| Engine Configuration | 1x Yamaha 350 HP |
| Displacement | 7,981 lbs. |
Test Conditions
| Date | 6/15/2026 |
| Location | Bristol, Rhode Island |
| Average Speed (auto) | 34 mph |
| Average Speed (manual) | 34 mph |
| Seas | Stern Quartering |
| Sea Conditions | 1 ft at 2 sec |
Performance Results
45%
ROLL ELIMINATION
55%
Pitch ELIMINATION
Roll Rate Comparison
Pitch Rate Comparison
Performance results are measured with the system on and off as a reduction of standard
deviation in pitch and roll rates at all frequencies at a constant heading and speed.
