In pursuit of increased reliability and improved signal levels, we employ a scanning approach that supports the highfrequency acquisition requirements of the system while utilizing a large aperture receiver. A continuously rotatingcircular scanner was developed using direct inductance drives to rotate a Fresnel prism, acting as synchronizedtransmitter-receiver optical element with a fixed incident angle to the sea surface. Circular scanning introduceschallenges in evaluating the system's coverage. Bу its nature, a circular scanning pattern introduces non-uniformity.Unlike galvo-based scanners roll and pitch compensation is practically impossible for a large mechanism, thereforecareful planning is required to ensure continuous coverage under realistic operational conditions. Selection of optimaloperation parameters is discussed as well as different ways to evaluate surface coverage in different operation modes.
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