This are the spanish build Halcón class of the Prefectura Naval Argentina (coast guard), they were put in to service between 1982 and 1983, and has helicopter deck and hangar.
This are not strictly of the navy.
Do not have the hull, i try to find it and put it.
This first draw is different from the other 4 that follow, has differences in high. I make a decision about which type of draw after a little more research of the vessel.
I do expect your critics and comments to improve them.
GC-24 Dr. Manuel Mantilla
GC-27 Prefecto Piqué
And the GC-28 Prefecto Derbés
This one has recently fitted with a crane and has removed the main gun, i supose the crane prevents the use of helicopter.