He began his second tour in spring of 1968 and John Kerry came onto the swift boat in January of 1969.
Kerry may have become OIC of PCF 93 on January 30, at the earliest. So it might not be a lie.
But, unless I'm misreading the dates, the first
February after-action report for PCF 94 (still available on Kerry's website --- download it while you can!) is on February 13. And Kerry's old boat, PCF 44,
was involved in operations in the interim.