I finished the coastal freighter as a auxiliary Gunboat. The weapons are as always from the Warlord and Heroic & Pos weapons sets. VP 1037 is a Vorpostenboot as it was very often used in the channel , north sea and the baltic during the second WW. It was used for escort duties for small convoys , or for escorting U boats back to base through the biscay sea.
And a size comparison with a E boat:
You can get a Auxiliary Gunboat here.