Folios 336-344: CB number 01462 O.X.O, Copy number 445, UB.52 Interrogation of Survivors,...

Folios 336-344: CB number 01462 O.X.O, Copy number 445, UB.52 Interrogation of Survivors, July 1918.

Folio 337: Cover sheet, UB.52.

Folio 338: table of contents.

Folio 338: Survivors of UB.52 (sunk 23 May 1918). Commanding officer Lieutenant Otto Launburg and Navigating Warrant Officer Heinrich Klein.

Folios 339-340: Former Cruises of Lieutenant Otto Launburg. Launburg had been a watch keeping officer on U.35 in the Mediterranean commanded by Lieutenant Commander Arnauld de la Periere who was very successful sinking ships by gunfire. He then commanded U.37 taking her out to the Mediterranean. He then commanded UB.52 also taking her out to the Mediterranean.

Folio 340: Last Cruise of UB.52. Launburg drew a rough sketch of UB.52?s outward and homeward journeys. She was torpedoed on 23 May 1918 by British submarine H.4. Among the ships sunk was the Snowden whose captain and first officer were lost on board UB.52. Plate: Rough Track of UB.52, 18 April ? 23 May 1918 (folio 340).

Folio 340: sinking of SS Snowden.

Folios 341: Details of UB.52: Batteries, Bulkheads, Engines and Material.

Folio 341: Torpedoes: UB.52 carried 5 G/7 and 5 other torpedoes.

Folio 341: Gas Turbines for German Submarines. Launburg stated that experiments have been carried out on gas turbines for propelling submarines to give a surface speed of 24 knots and submerged speed of 16 Knots.

Folio 341: British and German Submarines Compared. German submarine oil engines and W/T apparatus are superior to British.

Folios 341-342: Allied Anti-Submarine Measures. The present system of convoy is not favourable to submarines. The Oranto Barrage is being passed on the surface. Launburg manoeuvred at periscope depth to avoid depth charges. He stated that he had dived to 150m but this was considered ?not credible?.

Folio 342: Commissioning of New Submarines. It is usual to keep commanding officers and his engineer together when commissioning a new submarine.

Folio 342: Pola-Cattaro Flotilla. Composition of the Flotilla.

Folios 342-343: Personnel. Names of commanding officers, Pay and Allowances and on Rewards and Decorations.

Folio 343: Provisions. Although cruises are seldom longer than 21 days, provisions are taken for six weeks.

Folio 344: Appendix: List of names and their ranks of Crew of UB.52.