Una vez superada la fase de Baubelehrung al uboote se le pintaba un emblema que lo acreditaba como “preparado para el combate...El "Frontreif".
Saludos.
PD: Lo que no sé es el significado del "badge" Frontreif. Tal vez Nazarius...
http://www.unterseeboote.co.uk/kriegsmarine4.htm
Un ejemplo de la formacion de la tripulacion y de los test de entrenamiento de un uboote...obtenido de un interrogatorio.
EARLY HISTORY OF U-210
U-210 was a 500-ton U-boat, Type VII C, built by the Germaniawerft, Kiel. She was the 10th boat in the series which started with U-201.
It is not known when U-210 was laid down. She was launched December 23, 1941. During that month engine room personnel began to arrive at the yard to stand by the boat in the final phase of construction. At the time, they were housed in a depot ship named HOLSTENAU; later they were transferred to the depot ship UBENA, a former Woermann passenger liner.
U-210 was commissioned on February 21, 1942. The commissioning ceremonies were attended by Kapitänleutnant (Lieutenant) Oskar MOEHLE in his capacity as Chief of the 5th U-boat Flotilla, to which U-210 had been assigned.
Trials did not begin until April. Severe ice conditions in the Baltic, which froze ports, delayed U-210's building program, and kept her locked in the harbor in Kiel. During the interim, she lay for a week alongside the Tirpitz-Mole, together with other unidentified U-boats.
Prior to her departure from Kiel on April 24, U-210 had put in three weeks of trials in and about Kiel. Engines, pumps and other machinery, as well as S-gerät (search gear), were tested. The boat entered the pressure dock, where the pressure hull was found satisfactory; initial diving trials and torpedo firing practice were also carried out.
On April 24, 1942, at 0800, with officers of the U.A.K. (U-boat Acceptance Commission) on board, U-210 left Kiel for the Eastern Baltic, arriving at Danzig the following evening at 2000. Daily trials were conducted in the vicinity
of Danzig until May 4, when she proceeded to Gotenhafen where tests were made by officials of the Torpedo Testing Commission. For the next three weeks U-210 was based at Hela.
On May 6, at 1600, U-210 crossed the Bay of Danzig to Pillau for further torpedo firing practice. A captured document, dated May 28, reports the loss of an enlisted man's cap during gunnery exercises. Prisoners stated that they practiced gunnery with moving targets. The nights of May 27, 28 and 29 were spent in Pillau. On May 30 and 31 the boat was in Danzig, apparently for repair of slight damage incurred in a collision with another U-boat.
U-210 continued her torpedo trials at Pillau, put in at Danzig again early on June 8, remaining in dock for three days, and left on the evening of June 10 for a week of tactical exercises off Gotenhafen. From June 11 until June 19 she carried out these trials in company with other U-boats and always out of sight of land. While working up, U-210 practiced oiling at sea from a supply U-boat (Zubringerboot), using her own pipe lines. At 1400 on June 19, the exercises completed, she sailed from Rönne (on Bornholm) arriving there early the next morning. The night of June 20 and the morning of June 21 were spent in hydrophone trials and in checking U-210 for electric motor noises at the shore listening post a Rönne.
The boat arrived in Kiel at 1130 on June 22. After a few short excursions, U-210 entered the Germaniawerft on June 27 for final adjustments prior to her first war cruise. She had been passed for war service by the U-boat Acceptance Commission; accordingly, a small device was painted on the after side of her conning tower. This consisted of a white German eagle, encircled by a wreath and surmounting a submerging U-boat which bore the word "Frontreif" (Ready for War).
