What is the measure of FMS?

Answer 1

I'm not sure of FMS, but I have heard of DMS:

DMS is short for Degrees, Minutes, Seconds and is used to measure angles:

• A full turn is 360 degrees;
• each degree is subdivided into 60 minutes or 60'
• each minute is subdivided into seconds or 60''

On calculators the button may be marked [° ' '']

Answer 2

There are well over 100 possibilities for the acronym FMS. Without further information or some context it is impossible to answer the question.