Attribute: Reference year for magnetic variation

Acronym: RYRMGV

Code: 130

Attribute type: A

Definition:

The reference calendar year for magnetic variation values.

References:

INT 1: IB 68.1, 70-71;

S-4: 270;

Indication:

the 'reference calendar year for magnetic variation' should be encoded using a 4 digit year-indication (CCYY).

Format:

CCYY (mandatory)