What does YN mean in Governmental & Military

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All YN meanings

What does YN stand for?

YN stands for "Boom Defence Vessel"

How to abbreviate "Boom Defence Vessel"?

"Boom Defence Vessel" can be abbreviated as YN

What is the meaning of YN abbreviation?

The meaning of YN abbreviation is "Boom Defence Vessel"

What does YN mean?

YN as abbreviation means "Boom Defence Vessel"