Accession Number:

AD0425155

Title:

COMPASS ROSE MAGNETIC ANOMALIES AT WHIDBEY ISLAND, OAK HARBOR, WASHINGTON,

Descriptive Note:

Corporate Author:

NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA

Personal Author(s):

Report Date:

1963-11-12

Pagination or Media Count:

19.0

Abstract:

The magnetic anomalies on the compass rose, Ault Field, Oak Harbor, Washington, prevent it from being used for magnetic compass calibration on aircraft. The present newly constructed pad does not comply with MIL-STD-765. Analysis of the magnetic anomalies measured on the pad show them to be numerous and widely dispursed. Degaussing the compass pad would not solve the problem since the degaussing would be a temporary measure effect and the magnetic anomalies of the rock fill and concrete would soon align themselves again with the earths magnetic field after the degaussing. Chemical analysis shows the rock fill contains 1.4 magnetic iron average by weight and the concrete contains about 1.9 magnetic iron by weight. It is recommended that a new compass pad should be constructed at Ault Field using a controlled amount of nonmagnetic rock aggregate. This report suggests a guide to determine acceptable aggregate for the new compass rose. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE