approx 13:00--285.1 unknown aircraft in comms w/VR-57,VRC-30 base, North Island NAS 16:20--273.95 HMX-1 helos air-air, callsign of one of them was Knighthawk 91. 16:25--123.85 Helo Knighthawk 91 w/Los Alamitos AAF tower. Josh monitoring from southeast LA county josh_75 at earthlink.net