The U-boat was fitted with the Schnorchel underwater-breathing apparatus which enabled her to stay under-water for extended periods thus avoiding detection by enemy warships.

The submarine was powered by two Germaniawerft F46 four-stroke, six-cylinder supercharged diesel engines producing a total of 2,800 to 3,200 metric horsepower (2,060 to 2,350 kW; 2,760 to 3,160 shp) for use while surfaced, two Brown, Boveri & Cie GG UB 720/8 double-acting electric motors producing a total of 750 metric horsepower (550 kW; 740 shp) for use while submerged.

An accident took place during U-1018's work-up period in the Baltic on 17 June which killed one crew member (Obersteuermann Walter Nellsen) and wounded two.

[3] In December 1944, she was moved from Kiel to Horten Naval Base in Norway to join 11th U-boat Flotilla, before departing on 21 January 1945 to patrol the Western Approaches of the English Channel under the command of Kapitänleutnant Walter Burmeister.

[5] U-1018 launched a torpedo which hit the Norwegian freighter Corvus which sank within a few minutes,[6] resulting in the death of five of the freighter's Norwegian crew, a 16-year-old British cabin boy, Thomas Boniface, and two British Royal Navy gunners, (part of the DEMS gun crew) including former professional footballer Charlie Sillett.