Thank to all you, guys! Your imput and feedback is as important as the vessels depicted here!
Yes, some vessels are astonishing old and still in service. I visited Puno at the Lake Titicaca in the early 90s and there was the Yapura, a steamer converted to diesel, in active service. It was built by the Thames Iron Works, disensambled and shiped to Peru, then traveled in mules across the highlands until the Titicaca basin, and finally ensembled once again and launched in Puno in 1873
! Now it is a hospital ship and renamed Puno (as its homeport). It had a sister ship, Yavari, which is afloat, but moored at the harbour.
Now, the last of the series (unfortunatelly, no more riverine gunboats until the first trinational amazon patrol gunboat), BAP Castilla.
It is the sister ship of Clavero, head of a class of two. It had a shallow draught of only 2 ft. and a deep draught of almost 1 mt. She is armed with 5 locally developed turrets, each one armed with a MaDeuce and a 40 mm grenade launcher from CIS. She is armoured (but I don´t know if it is armoured with steel or kevlar) and the troopers afloat can fire from behind cover (5 gun ports per side). Originally she was going to be painted with a very striking cammo, but for avoiding confusion (by the FARC gang) with the dark green columbian vessels, they stayed with the standard gray. Cheers!
PS1: I read about the satellite communications for its instalation in 2016, but until now, I have not seen a photo form the vessel with the caracteristic dome.
PS2: It was a pity, but the gunboat was designed with tunneled screws and rudder, instead of waterjets.