[gap]

Originally Posted by kevinsue

Just wasted my FAT1 torpedoes practicing on an allied convoy because I intended to refit at Pantelleria island in the Mediterranean Sea but guess what? They didn't have any fuel or torpedoes to give me. I forgot that Vecko had removed the player's abilities to take provision (aka torpedo and fuel) in every "blue" coastal harbour. Only historically correct bases will be able to support U-Boat operations.... Is there a listing somewhere of the friendly bases that support u-boat refits?

Haha....I should have googled it first! Red dots are historic u-boat bases. Well...Salamis isn’t on the map...the nearest port is Piraeus so I still don’t know where to get some ammo!

Interesting question. Pantelleria never was a submarine base, so Vecko was right in removing it, along with many other harbors, from the list of Mediterranean ports that we can refit from.
Cagliari (Sardinia), Naples (Campania), Messina and Augusta (Sicily) and Leros (South Aegean, Greece), were Reggia Marina submarine bases though. Out of them, due to its position (at the center of the Mediterranean, at the intersection between the Tyrrhenian and the Ionian Sea, and about equidinstant from the Italian bases of La Spezia and Pola), Messina, though officially not being an U-boat base, was of key importance to the German war effort in the Mediterranean, especially in the first year (from '43 on, after Operation Torch and the Allied invasion of North Africa, Sicily became unsafe as it came into the range of Allied air raids).
Matter-of-factly, from December '41 to December '42, there are at least 22 recorded U-boat visits in Messina:

1. U-562, coming from Brest (1st U-Fl.) and bound for Pola (29th U-Fl), on December 6th, 1941 made a quick stop in Messina, where she embarked fresh torpedoes.
   
   
2. U-557, coming from Lorient (1st U-Fl.) and bound for ? (recently assigned to the 29th U-Fl, the U-boat was sunk during this patrol; looking at her last known positons before the sinking, she would have probably ended the patrol in Salamis or in Pola), made a 2-day stopover in Messina, from December 7th to December 9th, 1941.
   
   
3. U-652, coming from Lorient (3rd U-Fl.) and bound for La Spezia (29th U-Fl), made a 2-day stopover in Messina, from December 12th to December 14th, 1941.
   
   
4. U-77, coming from Lorient (7th U-Fl.) and bound for Salamis (23rd U-Fl), made a 2-day stopover in Messina, from December 19th to December 21th, 1941.
   
   
5. U-83, coming from Brest (1st U-Fl.) and bound for Salamis (23rd U-Fl), made a 2-day stopover in Messina, from December 23rd to December 25th, 1941.
   
   
6. U-74, coming from St. Nazaire (7th U-Fl.) and bound for La Spezia (29th U-Fl), made a 3-day stopover in Messina, from December 24th to December 27th, 1941.
   
   
7. U-573, coming from St. Nazaire (3rd U-Fl.) briefly stopped in Messina on December 27th, 1941, before ending her 2nd patrol three days later in Pola and being assigned there to the 29th U-Fl.
   
   
8. U-577, coming from St. Nazaire (7th U-Fl.) and bound for ? (recently assigned to the 29th U-Fl, the U-boat was sunk during this patrol; looking at her last known positons before the sinking, she would have probably ended the patrol in Salamis or in Pola), made a 11-day long stopover in Messina from December 27th, 1941 to January 7th, 1942.
   
9. U-133, coming from St. Nazaire (7th U-Fl.) and bound for Salamis (23rd U-Fl.), made a 3-day stopover in Messina from December 29th, 1941 to January 1st, 1942.
   
   
10. From January 19th to January 25th, 1942, during her 2nd patrol whose start/end port was the U-boat base of La Spezia, U-375 (29th U-Fl.) made a 6-day stopover in Messina.
    
    
11. U-73, coming from St. Nazaire (7th U-Fl.) and bound to La Spezia (29th U-Fl.), made a 11-day stopover in Messina, from January 20th to January 31st, 1942.
    
    
12. From January 22nd to January 25th, 1942, during her 4th patrol whose start/end port was the U-boat base of La Spezia, U-431 (29th U-Fl.) made a 3-day stopover in Messina.
    
    
13. U-561, coming from Brest (1st U-Fl.) and bound for Pola (23rd U-Fl.), made a 4-day stopover in Messina from January 22nd to January 26th, 1942.
    
    
14. On February 8th, 1942, during her 5th patrol whose start/end port was the U-boat base of La Spezia, U-205 (29th U-Fl.) stopped briefly in Messina.
    
    
15. On Aprile 4th, 1942, during her 6th patrol whose start/end port was the U-boat base of La Spezia, the aforementioned U-205 (29th U-Fl.) stopped briefly in Messina.
    
    
16. U-331 (29th U-Fl.), coming from Salamis and bound for La Spezia, stopped 5 days in Messina from May 21st to May 25th, 1942, where she underwent repairs from damage she had suffered previously during her patrol.
    
17. The aforementioned U-561 (23rd U-Fl.), coming from Pola and bound for La Spezia, made a 7-day stopover in Messina from June 25th to July 2nd, 1942.
    
    
18. The same U-561, stopped briefly in Messina between 11 and 12 September, 1942, during U-boat's 9th patrol (patrol start/ending port: La Spezia).
    
    
19. U-559 (29th U-Fl.), coming from Salamis and bound for ? (probably the same port where the patrol was started from, but the boat was sunk before she could end her patrol), made an 8-day stopover in Messina from September 21th to September 29th, 1942.
    
    
20. The aforementioned U-77 (29th U-Fl.), coming from Pola and bound for La Spezia, briefly stopped in Messina between October 29th and October 30th, 1942.
    
    
21. U-371 (29th U-Fl.), coming from Pola and bound for La Spezia, made a 3-day stopover in Messina from December 4th to December 7th, 1942.
    
    
22. Again U-561, coming from La Spezia and bound for Pola, made a 5-day stopover in Messina from December 18th to December 23rd, 1942.

If you can read Spanish, u-historia.com has fairly detailed patrol reports for each boat.

Summing up, out of 22 recorded visits:

• 11, from early December 41 to late January 42, were by U-boats that had just crossed Gibraltar and were bound either for La Spezia, Pola or Salamis.
  
  
• 5, from late January 42 to mid September of the same year, were by U-boats who had started/ended their patrol in La Spezia, on the way to/from their operation areas off the coast of Egypt.
  
  
• 2, from late May 42 to late September of the same year, were by U-boats who had started their patrol from Salamis operating in the Levantine Sea off the coast of Egypt.
  
  
• 3, from late June 42 to early December of the same year, were by U-boats who had started their patrol from Pola ending it in La Spezia after operations in the Levantine Sea.
  
  
• 1, in mid-late December 42, was by an U-boat staring her patrol from La Spezia and ending it in Pola, after having operated off Morocco (before the refit in Messina) and in the Levantine Sea (after the refit).

Though not stated, most of the visits must have been for refuelling and for making provisions, but at least in one case (U-331) it is stated tha the U-boat underwent repairs, and in another case (U-562) an accident during the loading onboard of torpedoes is recorded, meaning that, at least in limited stocks, German torpedoes might have been available at the Sicilian base