Like all Type UB III submarines, UB-115 carried 10 torpedoes and was armed with a 8.8 cm (3.46 in) deck gun.

UB-115 would carry a crew of up to 3 officers and 31 men and had a cruising range of 7,420 nautical miles (13,740 km; 8,540 mi).

UB-115 was depth charged until destroyed and went down at position 55°14′46″N 1°22′45″W / 55.24611°N 1.37917°W / 55.24611; -1.37917 (WGS84), about 4.5 nautical miles (8.3 km; 5.2 mi) northeast of Beacon Point, Newton-by-the-Sea, off Northumberland.

All 39 men aboard the submarine died in the attack and sinking.

[4] [5] UB-115's wreck lies in two pieces and is covered in soft corals and an accretion formed from fly ash from a local power plant.