Attribute: Value of local magnetic anomaly

Acronym: VALLMA

Code: 175

Attribute type: F

Definition:

The value of the deviation from the normal magnetic variation.

References:

INT 1: IB 82.1-2;

S-4: 274;

Indication:

Unit: minute (')

Resolution: 0.1'

Format:

xx.x

Example:

2.3 for a deviation of 2.3 minutes.

Remarks:

The deviation is assumed to be positive and negative. The plus/minus character shall not be encoded.