The US Naval Institute News Service has a report that may be of interest because of the potential for interaction with Venezuelan forces in the Caribbean.
“The seven missile craft aboard Makran are each approximately 57 feet (17.5 meters) long and match the Peykaap family of medium-sized fast attack craft operated by Iran. There are several variations of these craft in Iranian service, although all are generally similar. The latest Peykaap-II type (also known as the Bavar class) is 57 feet long and can carry two anti-ship missiles and two 12.75 inch torpedoes. The missiles could be of the Kowsar or Nasr types, which are derived from Chinese models with a quite modest range of around 18 nautical miles.”
An 18 nautical mile range may be “quite modest” to the Navy, but it is twice that of anything the Coast Guard has.
Chuck Hill's CG Blog 
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These boats must have been extremely cheap, to send an Iranian Naval Vessel to Venezuela to acquire them. Given that Iran and the PRC share a land route railroad border…
@Secundius, The Iranians made them and are shipping them to Venezuela. As of right now we don’t know if the Iranians will retain control of them or turn them over to the Venezuelans. If they turn them over to the Venezuelans, we don’t know who will crew them, Venezuelans or Iranians.
But then again, who flies the aircraft of the Venezuelan Air Force? Venezuelans, Cubans, Russians or Chinese…
Some more detail here: http://www.hisutton.com/OSINT-Update-Makran-Iran-Venezuela.html