LYNCEUS passing Jarrow, heading downriver from Walker 08/01/2018.
I'm guessing that she was delivering a pilot to SCHOKLAND.
I was wondering why POT chose the name LYNCEUS so I checked on Wiki.
"In Greek mythology, Lynceus was the jealous murderer of Castor . . . was said to have excellent sight, even able to see through trees, walls and underground"
So the name does have relevance for the POT survey boat (not the jealous murderer bit).