It is for radar mounted on surface vessels, for detection / distance direction measurement / search.

In addition, the Ayanami-class destroyer was equipped with AN/SPS-12, which was an improved version of AN/SPS-6, and this technology was backfitted to OPS-1.

From 1973, it has been switched to the OPS-14B, which has enhanced clutter suppression performance by introducing movement target detection (MTI) technology.

In addition, the magnetron was used as the oscillator in the past, but in the OPS-14C, it was changed to the klystron with the introduction of pulse compression technology, and the ECCM capability was strengthened.

However, compared to the OPS-11 installed on the conventional destroyers, the maximum detection distance was only about half, and there was doubt about the reliability of the anti-aircraft warning ability when acting alone.