Direction Finder Requirements for Submarines with Special Reference to the Use of the SV Radar Reflector
Abstract
The discussion of the use of the back of the SV radar reflector on submarines, which is the fundamental purpose of this report, necessitates an extensive discussion of the problems associated with submarine direction finding in general. The mechanical and electrical difficulties of providing for direction finders, the time requirements for taking bearings with rotating direction finders on fluctuating signals are investigated and the relative merits of possible types of direction finders are evaluated. In particular, a design for a direction finder of the maximum type for SV mounting is described and the lack of utility of this type, as well as the null type, for signals of varying amplitude is shown. The most desirable alternative is seen to be a series of instantaneous direction finders mounted on a non-rotating extensible mast. As an interim measure only, and for existing submarines where a separate mast cannot be added, a solution is presented in the form of an increase in the range of an existing equipment, the Model DBW, to 1000 Mc, and the addition of a high speed spinning type -antenna for "S" and "X" bands, neither type being on an extensible. mount. The incorporation of a lobe switching type direction finder in the SV to cover 500 to 4500 Mc. is demonstrated to be less desirable although it gives periscope depth operation. Specific recommendations are made as to the course direction finding for submarines should take in the future.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 09, 1946
- Accession Number
- AD1193972
Entities
People
- H. D. Arnett
- J. O. Spriggs
Organizations
- United States Naval Research Laboratory