Complex sentence: The Iranian guided missile gunboat Paykan was sunk during Operation Morvarid in 1980, while the guided missile gunboat Joshan was sunk during Operation Praying Mantis in 1988, these ship must not be confused with the new Joshan and Paykan which were named in their memories.
Split into simpler sentences: The Iranian guided missile gunboat Paykan was sunk during Operation Morvarid in 1980, while the guided missile gunboat Joshan was sunk during Operation Praying Mantis in 1988. These ship must not be confused with the new Joshan and Paykan which were named in their memories.