These two stamps depict buoy tenders, which are used to maintain and replace navigational buoys and markers along the Swedish coast and inland waterways.
The larger vessel has the name MALMO on the stern, can not find a buoy tender under that name under Swedish registry, and most probably it is the homeport of the vessel
The smaller ship has the name PILOT on her side, but on the stamp design is she used as a buoy tender, with a few markers poking out of her starboard side.
A “pilot” boat as seen on this stamp is used to transport pilots from a shore station in Sweden to a waiting ship off a port entrance. She also takes the pilot from the ship when it is outgoing, mostly at the entrance buoy of the fairway.
In the series "Nya Sjömark", which was issued on 3 June 1982, Skagsudde Lighthouse is on one of the five stamps, as the background of a navigation mark and a pilot boat.
Skagsudde is located next to Skeppsmalns fishing village in Ångermanland and is a pilotage station for the ports of Örnsköldsvik and Husum. The lighthouse was built in 1957 and consists of a 26-metre tall concrete tower, white with a red ribbon. The tower is built with a pilothouse in front of the tower.
Sweden 1982 1k65 sg1122, scott? and sg1123, scott?