It was more advanced than anything the crabs had at the time and was certified for use for SAR on the Bristow Bell 212s. We had 1 unit based on the Treasure Finder as a declared facility available for use by the Coastguard (though it was paid for by Shell and available primarily for use in the Brent field). Shell, Bristow and Louis Newmark developed a system which at the time was fairly advanced and which later was certified as the LN400 in the SAR S61. Because of the low power margins of the 212 in low winds and a control reversal in pitch at certain low airspeeds it was never certified for auto hover on the 212 and only the yaw channel could be coupled when lined up on final approach.