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Great Gear

Humphree Trims it Down a Notch

Swedish manufacturer Humphree has introduced its smallest trim tab to date—the 350mm Interceptor HA350.
The range now extends from 1,500mm down to 350. The HA350 was mainly developed for leisure craft from 25 to 45 feet and commercial boats where excellent control of running trim and improved maneuvering at speed is desired, but where available space is limited.
The HA350 Interceptor is basically a smaller version of the popular HA500 Interceptor and is produced in the same high quality composite material. HA350 is also asymmetric as is the HA500, which means that it comes in both a right and a left version, where the shaft is offset to one side or the other. The Interceptor can withstand operational speeds of up to 50 knots and above.

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Sea Trial Data Acquisition System Borrows from Aviation

Gathering accurate and detailed sea trial information is key to establishing the performance of a vessel and its propulsion system. In order to obtain performance data during sea trials, a portable data-acquisition system is required, one that allows data to be collected even in rough sea conditions when reading on-board instruments proves difficult.


To solve the problem, CJR has taken a novel approach. Instead of using an existing system with limited functionality, CJR has adapted the same technology used to gather flight data from unmanned air vehicles (UAVs). The control of UAVs requires real-time accurate information about the aircraft attitude and GPS position and is, in many ways, similar to the information required during sea trials.

CJR Propulsion has been working in collaboration with a major autopilot system manufacturer to develop the TrialDAS—a data-acquisition system specifically tailored to gathering useful and accurate statistics during sea trials. The new TrialDAS features a comprehensive onboard sensor suite (3-axis accelerometers, 3-axis gyroscopes, 3-axis magnetometers) and uses complex algorithms to combine the collated information to provide accurate trim, roll and heading information. It has a GPS receiver with an active antenna to provide ship position, ground speed and heading and collects data 10 times per second. The acquisition system also allows on-board vibration levels to be measured at a frequency of 1kHz, with data acquired 50 times a second. The system is expandable and adaptable, with plans for a shaft RPM sensor, rudder angle and shaft torque sensors well underway.

The TrialDAS includes a real-time monitoring program, and automated reporting so that reports can be generated at the touch of a button and before the yacht is even back in the harbor. Trials relating to specific rpm ranges or particular conditions are also possible with the TrialDAS’ easy to use start-stop functionality, meaning multiple reports can be generated from a single trial.

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Two New GMRS Radios from Cobra

The CXT235

The CXT235

Cobra Electronics has introduced two new GMRS two-way radios. The CXT135 and CXT235 feature advanced NOAA Weather Radio (NWR). The CXT235 also has All Hazards Alert, providing audible alerts.

The new NWR feature allows listening to the NOAA Weather Radio All Hazards broadcasting of continuous weather information directly from the nearest National Weather Service nationwide network of transmitters. NWR relays official weather service warnings, watches, forecasts and other hazard information 24 hours a day, 7 days a week.

The CXT135 has a range of up to 16 miles, Power Saver circuitry for extended battery life, Call Alert and rechargeable NiMH batteries. The CXT235 includes all the features of the CXT135, plus a range of up to 20 miles. Its NOAA All Hazards Alerts provides audible tones in the event of a weather alert or other emergency. The NOAA Alert feature activates an automatic alarm on the radio if NOAA sends a tone alert with the warning. The tone will activate an alarm on the CXT235, even if the audio volume is turned down.

The CXT135 has an MSRP of $49.95, while the CXT235 is listed at $59.95.

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