LANBY

[3] UK models followed the General Dynamics design: Power was supplied by three diesel alternators of 230 V, individually rated at 5 kW continuous output.

A static rectifier provided continuous power at 28 V DC, charging a nickel-iron accumulator to operate the xenon discharge tube main light and ancillary equipment, including a UHF telemetry link to a monitoring shore station.

The Hawker Siddeley models incorporated components from the original General Dynamics design, but were found adequate with only two diesel generator sets — one running continuously for six months, and one on standby.

[3][4] Experience showed that it was difficult to attain the required reliability in British waters due to the high acceleration forces experienced in rough seas with 14-metre (46 ft) waves and 7-knot (8.1 mph; 13 km/h) currents.

Alternative experiments were made with more stable platforms, such as the Royal Sovereign Lighthouse — a concrete tower on a flat base constructed on shore, floated into place and sunk to rest on the seabed.