- Construction
- Summary of raiding history
- References Notes Citations
- Bibliography
{{Other ships|German submarine U-73}}{{Infobox ship image| Ship image=UB 148 at sea 2.jpeg | Ship caption=UB-148 at sea, a U-boat similar to UB-73.
}}{{Infobox ship career | Ship country=German Empire | German Empire|naval}} | Ship name=UB-73 | Rössler|1979|p=61}} | Ship builder=AG Vulcan, Hamburg | Ship original cost=3,337,000 German Papiermark | Ship yard number=97 | Ship laid down= | Gröner|1991|pp=25-30}} | Ship completed= | Gröner|1991|pp=25-30}} | Gröner|1991|pp=25-30}}
}}{{Infobox ship characteristics | Hide header= | Gröner|1991|pp=25-30}} | Ship class=German Type UB III submarine | 508|t|LT|lk=in|abbr=on}} surfaced- {{convert|639|t|LT|abbr=on}} submerged
| 55.52|m|ftin|abbr=on}} (o/a) | 5.76|m|ftin|abbr=on}} | 3.70|m|ftin|abbr=on}} | Ship propulsion=*2 × propeller shaft- 2 × Körting four-stroke 6-cylinder diesel engines, {{convert|780|kW|bhp|abbr=on|order=flip|lk=in}}
- 2 × Siemens-Schuckert electric motors, {{convert|580|kW|shp|order=flip|abbr=on|lk=in}}
| 13.4|kn|lk=in}} surfaced- {{convert|7.5|kn}} submerged
| 8,420|nmi|abbr=on|lk=in}} at {{convert|6|kn}} surfaced- {{convert|55|nmi|abbr=on}} at {{convert|4|kn}} submerged
| 50|m|ft|abbr=on}} | Gröner|1991|pp=25-30}} | 50|cm|in|1|abbr=on}} torpedo tubes (4 bow, 1 stern)- 10 torpedoes
- 1 × {{convert|8.8|cm|in|2|abbr=on}} deck gun
| Ship notes=
}}{{Infobox service record | is_ship=yes | is_multi=yes | partof=*V Flotilla- 30 November 1917 – 2 May 1918
- I Flotilla
- 2 May – 11 November 1918
| commanders=*Kptlt. Woldemar Adam[1]- 2 October 1917 – 28 February 1918
- Kptlt. Karl Neureuther[2]
- 1 March – July 1918
- Kptlt. Max Bräutigam[3]
- 8 July – 11 November 1918
| operations=6 patrols | victories=- 8 merchant ships sunk ({{GRT|18,806}})
- 1 warship sunk (495 tons)
}} | SM UB-73 was a German Type UB III submarine or U-boat in the German Imperial Navy ({{lang-de|Kaiserliche Marine}}) during World War I. She was commissioned into the German Imperial Navy on 2 October 1917 as SM UB-73.{{#tag:ref|"SM" stands for "Seiner Majestät" ({{lang-en|His Majesty's}}) and combined with the U for Unterseeboot would be translated as His Majesty's Submarine.|group=Note}} UB-73 was serving in the Mediterranean. On 21 November 1918 she was surrendered to France as required by the regulations of the Armistice with Germany.{{sfn|Gröner|1991|pp=25-30}} Construction{{Main|German Type UB III submarine}}UB-72 was ordered by the GIN on 23 September 1916. She was built by AG Vulcan of Hamburg and following just under a year of construction, launched at Hamburg on 11 August 1917. UB-73 was commissioned later that same year . Like all Type UB III submarines, UB-73 carried 10 torpedoes and was armed with a {{convert|8.8|cm|in|2|abbr=on}} deck gun. UB-73 would carry a crew of up to 3 officer and 31 men and had a cruising range of {{convert|8,420|nmi|lk=in}}. UB-73 had a displacement of {{convert|508|t|LT|lk=in|abbr=on}} while surfaced and {{convert|639|t|LT|abbr=on}} when submerged. Her engines enabled her to travel at {{convert|13.4|kn|lk=in}} when surfaced and {{convert|7.5|kn}} when submerged. Summary of raiding history| Date | Name | Nationality | Tonnage[4] | Fate[5] |
|---|
| 7 April 1918 | Catriena | {{flag|Netherlands}} | 115 | Sunk | | 11 April 1918 | Myrtle Branch | {{flag|United Kingdom|civil}} | 3,741 | Sunk | | 14 April 1918 | Chelford | {{flag|United Kingdom|civil}} | 2,995 | Sunk | | 16 April 1918 | Ladoga | {{flag|United Kingdom|civil}} | 1,917 | Sunk | | 16 April 1918 | Lodaner | {{flag|United Kingdom|civil}} | 3,291 | Sunk | | 18 April 1918 | Dalegarth Force | {{flag|United Kingdom|civil}} | 684 | Sunk | | 23 June 1918 | Mountain Laurel | {{flag|Norway}} | 705 | Sunk | | 24 June 1918 | {{HMS|D6 | 6} | {{navy|United Kingdom}} | 495 | Sunk | | 25 June 1918 | Orissa | {{flag|United Kingdom|civil}} | 5,358 | Sunk |
ReferencesNotes1. ^{{cite Uboat.net|id=4|name=Woldemar Adam|type=1comm|accessdate=4 February 2015}}
2. ^{{cite Uboat.net|id=220|name=Karl Neureuther|type=1comm|accessdate=4 February 2015}}
3. ^{{cite Uboat.net|id=36|name=Max Bräutigam|type=1comm|accessdate=4 February 2015}}
4. ^Merchant ship tonnages are in gross register tons. Military vessels are listed by tons displacement.
5. ^{{cite Uboat.net|id=ub73|name=UB 73|type=1boat|accessdate=4 February 2015}}
Citations{{Reflist|colwidth=30em}} Bibliography {{Refbegin}}- {{Cite book| last = Bendert| first = Harald |title=Die UB-Boote der Kaiserlichen Marine, 1914-1918. Einsätze, Erfolge, Schicksal | location = Hamburg | publisher = Verlag E.S. Mittler & Sohn GmbH| year = 2000 | isbn = 3-8132-0713-7 | language = German| ref = harv}}
- {{cite book
|last1=Gröner
|first1=Erich
|author-link1=
|author-mask1=
|last2=Jung
|first2=Dieter
|display-authors=
|last-author-amp=
|last3=Maass
|first3=Martin
|translator-last1=Thomas
|translator-first1=Keith
|translator-last2=Magowan
|translator-first2=Rachel
|year=1991
|title=U-boats and Mine Warfare Vessels
|volume=2
|work=German Warships 1815–1945
|location=London
|publisher=Conway Maritime Press
|isbn=0-85177-593-4
|ref=CITEREFGr.C3.B6ner1991
}}- {{Cite book|last=Rössler|first=Eberhard|title=U-Bootbau bis Ende des 1. Weltkrieges, Konstruktionen für das Ausland und die Jahre 1935 – 1945|work=Die deutschen U-Boote und ihre Werften|volume=I|year=1979|location=Munich|publisher=Bernard & Graefe|isbn=3-7637-5213-7|language=German|ref=harv}}
{{Refend}}{{German Type UB III submarines}}{{Use dmy dates|date=June 2015}}{{DEFAULTSORT:Ub073}} 5 : German Type UB III submarines|World War I submarines of Germany|U-boats commissioned in 1917|1917 ships|Ships built in Hamburg |