The Greek Tjeld type patrol boats were a set of six fast patrol boats built to a Norwegian design and operated by the Hellenic Navy during the 1960s & early 1970s.

The six vessels were built by the Norwegian company Westermoen of Mandal, Norway, to the same design as that of the Tjeld class patrol boats built by Westermoen for the Royal Norwegian Navy in 1959.

This was, in turn, based on their prototype fast patrol boat, the Nasty, and the Greek vessels are also described as the "Improved Nasty type".

[1] Other sources give the names "Nasty-type" & "Nasty-class" patrol boats.

In 1982, Iniohos was discarded and the remaining vessels were re-numbered P196-200 (inclusive); all were decommissioned & placed in reserve or sold in 1983.