Yamaha’s Harmo technology could make quieter, more flexible electric boats.

According to Yamaha, electric vessels will soon become quieter and easier to operate, according tomedia New Atlas. The company’s new Harmo steering and propulsion systems are expected to be implemented in both areas. At first glance, the Harmo propulsion looks like an ordinary outboard motor — one part protrudes horizontally from the back of the boat and the other parts are vertically down from the top, pointing toward the water.

Yamaha's Harmo technology could make quieter, more flexible electric boats.

However, unlike traditional outboard motors, the whole thing does not rotate left or right. Instead, only the vertical part does this, rotating nearly 90 degrees relative to the top. Yamaha says this setup can improve mobility, including field turns. At the bottom — that is, under water — is a combined propeller/motor unit. It uses a Drive By Rim motor, in which the electromagnets activated in a sequence around the steel propellers are used to rotate in any direction. It is reported that this technology can generate more thrust at lower propeller speeds, reducing vibration and noise.

Yamaha's Harmo technology could make quieter, more flexible electric boats.

Everything is controlled by the joystick located in the cockpit. In addition, when the boat leaves the water, the thruster can be flipped up to keep it away from injury.

Yamaha will trial the Harmo system on august 7 on a cruise ship in Hokkaido’s Otsuka Canal. The following video shows the setup of the system.