Status: Indexed

The Port Orchard Buoy No. 1, located in Sinclair Inlet, in Washington, was converted for RADAR calibration by the installation of special RADAR reflectors manufactured and installed by the Navy. These reflectors were so designed as to give a flat surface no matter in what position the buoy or ship might be. In order to limit the drift of the buoy, it was moored by three sinkers, each sinker having a mooring chain attached to a swivel at the bottom of the buoy. This arrangement cut down the normal drift to not more than five yards. This particular type of mooring was developed in the District to increase the stability of buoys for special stations.

In addition to the floating calibration units, three minor light structures were equipped with RADAR reflectors at Point Herron, Washington, Duwamish Head, Washington and Desdemona Sands, Oregon. These metal reflectors were mounted in the piling of the structure and therefore, did not change in the general appearance nor lessen the structures' effectiveness as aids to navigation. The installation at Desdemona Sands consisted of a metallic screen in two panels, each panel 8' by 8', forming an inverted "V". This screen was used for accurate orientation of the Army Service Craft Detector SCR-296 which was installed on Cape Disappointment. The reflector at Duwamish Head was requested by the Navy as necessary for five control RADAR calibration of ships in that area. The reflector there consisted of two cross metallic planes mounted on the piling underneath the lights. The reflector at Duwamish Head, Washington, proved most successful where a shore type reflector had previously failed to meet desired requirements.

In April, 1945, two of the three calibration targets and lighting equipment on the Blake Island RADAR calibration buoys were lost. The buoys were replaced by Coast Guard first class regular cans, equipped with 150mm lanterns. Due to the great depth of the water in that area, it was impossible to use chain as a mooring and consequently steel wire ropes were furnished by the Navy Yard for mooring. Dragging operations were carried out by Coast Guard tenders in an effort to recover the lost equipment, but the attempt was unsuccessful.

The last special purpose buoy to be installed, was a boresighting buoy requested by the Anti-Aircraft Training Center at Pacific Beach, Washington, and located 4,000 yards off the coast from the Station. Prior to the establishment of this buoy, a Coast Guard patrol craft from Grays Harbor, Washington, Had moored off the coast while the station's guns were being boresighted. The establishment of such a buoy not only facilitated the boresighting but also released


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