RDF Sounding

TM 11-6660-266-13

2-64. RDF Sounding. In the procedures below, unless otherwise specified, all references in parentheses refer

to Section 4 of TM 11-6660-280-10. Section 4 contains step by step procedures for operation of the MARWIN

Processor in the RDF mode.

To operate the AN/TMQ-38 in RDF mode, proceed as follows:

a. Verify RDF alignment (TM 11-6660-281-12, para 3-2).

b. Select Preflight Sequence (para 1.2).

ENSURE SAFETY PRECAUTIONS ARE OBSERVED WHILE

ACTIVATING SONDE BATTERY AND HANDLING SENSOR PROBE.

SENSOR PROBE IS EASILY BROKEN IF BENT TO SHARPLY. IF

PROBE IS BROKEN, ME SONDE IS RENDERED USELESS.

c. Activate sonde (para 2.1).

d. Tune RDF receiver (TM 11-6660-281-12, para 3-3.2).

e. Input current station location (para 1.2.6).

NOTE

Enter station altitude in meters.

f. Input "Front dir ()".

NOTE

This step is not shown in TM 11-6660-280-10. Enter true bearing of RDF

antenna by applying magnetic declination.

g. Enter calibration coefficients (para 1.3).

h. Enter surface observations (para 1.7).

NOTES

l Current PTU data information can be obtained from activated sonde

(para 1.6).

l Wind speed is entered in meters per second (m/s). Refer to Table 2-7

or conversion of knots to m/s.

i. Launch balloon (para 1.6 and TM 11-6668-281-12, para 3-3.4).

NOTE

Insure "RELEASE" prompt is displayed before launching balloon.

2-46