after "greif" had left arendal, lieutenant holthe took "jo" out of the harbour and set up an ambush east of the town in case the german warship came back in that direction. some time later on 9 april, "jo" steamed to lyngør where she met up with "grib" and "ravn". the three torpedo boats spent the next eight days trying to support the norwegian land forces being mobilized in telemark county, surviving several air attacks during the time. after considering evacuating the torpedo boats to the united kingdom, and dismissing the idea as infeasible, lieutenant holthe and the other commanders scuttled their vessels off lyngør on 17 april. the crews went home and the ship commanders tried to join norwegian forces in western norway.