Folios 264-280: CB number 01439 O.X.O, Copy number 439, UB. 85 Interrogation of Prisoners,...

Folios 264-280: CB number 01439 O.X.O, Copy number 439, UB. 85 Interrogation of Prisoners, May 1918. UB. 85 was sunk on 30 April 1918.

Folio 265: Cover sheet, UB.85.

Folio 266: table of contents.

Folios 266-268: Last Cruise of UB.85 (sunk on 30 April 1918). Proceeded from Heligoland on 16 April 1918 via Fair Isle to North Coast of Ireland. Patrolled off Lough Foyle, fired torpedoes at a steamer off Port Patrick and two off entrance to Belfast Lough. When submerging after sighting a drifter, the conning-tower hatch was not closed properly and water entered the control room. When the batteries gave off gas, surfaced and the crew surrendered. The engineer office opened the vents to ensure the submarine sinking. Plate I: Track of UB.85 (folio 267).

Folio 268: Previous History of UB.85. In February 1918 made a shake down cruise to the Dogger Bank and no attacks were made.

Folio 268: Crew of UB.85: Some experienced Petty Officers but most of the crew were inexperienced. The captain, Lieutenant-Commander Krech had little previous experience.

Folios 268-272: Details of UB.85: Appearance, Colour, Compasses, Conning-tower, Diving Capabilities, Engines, Fresh Water Supply, Fuel, Hydroplanes, Motors (main), Motors (auxiliary), Navigation Apparatus, Silent Running, Sound Signalling Apparatus, Steering Gear, Tanks, Telephone Buoys, Trimming Pump, Wireless Telegraphy. Plate II: Ball Thrust Block (folio 270). Diagram of Navigation Apparatus (folio 271). Diagram of Hydrophones (folio 271). Diagram of Sound Signalling Transmitter (folio 272). Diagram of W/T Deck Insulator Tube (folio 272).

Folios 272-274: Converted Mercantile Submarines: On U.155, U.156 and U.157 armament of two 5.9-in. guns and four torpedo tubes. Plate III: U.155 Rough Sketch Drawn from Memory (folio 273).

Folio 274: Cruiser Submarines U.139-150. Informant saw one of these new submarines lying in Kiel in January 1918.

Folio 274: Submarine Construction: U.121, UB.119, UB.120, UB.123 and UB.124. Losses: U.61, U.75, U.93, U.109, UB.22, UB.61, UB.63, UB.69, UB.75, and UB.76. Salvaged: UC.45 and UB.84.

Folio 275: Fifth Submarine Flotilla, Bremerhaven was about to be disbanded but included: UB.21, UB.34, UB.62, UB.64, UB.65, UB.67, UB.73, UB.77, UB.82, UB.83, UB.86 and UB.87.

Folios 274-275: List of names of officers serving in different submarines.

Folios 275-276: Cruises of U.71, U.75, U.93, U.107, U.157, UB.15, UB.62, UB.63, UB.64 and UB.83.

Folios 276-277: Technical description of the Fottinger Transformer on the destroyer V.46. Plate IV: Fottinger Transformer (folio 276).

Folio 277: One informant had served three yard on the Battle Cruise Derfflinger where his action station was in B turret. Information on Arrangements in case of Fire in Turret or Magazines and Damage Sustained in Battle of Jutland.

Folio 277: Battleship Schleswig-Holstein was hit once at Jutland and is now a depot ship.

Folios 278-280: Appendix I: Translation of Diary of Engine-Room Warrant Officer Georg Lanczkowski in UB. 62 and UB. 65.

Folio 281: List of Crew of UB.85.