Retractable Thrusters

The thruster’s stainless steel structure is tapered to reduce drag. Hidden Power

If you like the idea of getting maximum efficiency out of a thruster that extends beneath the bottom of your boat, but would prefer it be out of the way while running, check out a retractable thruster. It can be mounted at a boat’s bow or stern and retracts into the hull beneath a covering plate. Because a retractable thruster when deployed extends deeper into the water than a tunnel-style thruster, it also tends to exert more influence in cases where a tunnel type that’s closer to the water’s surface would ventilate. Some manufacturers of retractable thrusters are Max-Power (, Side-Power (, and Vetus ( Retractable thrusters are generally more expensive than tunnel types with the Side-Power SR80/185T-12V starting at $11,300 on the IMTRA Web site. This particular thruster is designated for boats from 35 to 48 feet long.

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