SEAKEEPER RIDE SEA TRIAL REPORT
Vessel Characteristics
| Boat Make | Sportsman Boats |
| Boat Model | Open 402 |
| Boat Year | 2027 |
| System | Seakeeper Ride 750 Quad |
| Length Overall | 40 ft. 4 in. |
| Beam Overall | 13 ft. 0 in. |
| Engine Configuration | 4x Yamaha 350 HP |
| Displacement | 19,436 lbs. |
Test Conditions
| Date | 7/10/2026 |
| Location | Islamorada, Florida |
| Average Speed (auto) | 32 mph |
| Average Speed (manual) | 32 mph |
| Seas | Stern Quartering |
| Sea Conditions | 3-4 ft. at 3 sec |
Performance Results
24%
ROLL ELIMINATION
48%
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.
