 The Kriegsmarine ( German navy ) had at least three surface ships in the Loire estuary : a destroyer , an armed trawler and a Sperrbrecher ( minesweeper ) , the latter being the guard ship for the port . On the night of the raid there were also four harbour defence boats and ten ships from the 16th and 42nd Minesweeper flotillas berthed in the basin , while two tankers were berthed inside the Normandie dock . The 6th and 7th U @-@ boat flotillas , commanded by Kapitänleutnant Georg @-@ Wilhelm Schulz and Korvettenkapitän Herbert Sohler respectively , were permanently based in the port . It is not known how many submarines were present on the day of the raid . The submarine base had been inspected by the U @-@ boat Commander in Chief , Vizeadmiral Karl Dönitz , the day before the raid . He asked what would they do if the base was subject to an attack by British Commandos . Sohler replied that " an attack on the base would be hazardous and highly improbable " . 
 The Kriegsmarine ( German navy ) had at least three surface ships in the Loire estuary : a destroyer , an armed trawler and a Sperrbrecher ( minesweeper ) , the latter being the guard ship for the port . On the night of the raid <a href='dey_it' title='1'><mark>there</mark></a> <a href='uninflect' title='2'><mark>were</mark></a> also four harbour defence boats and ten ships from the 16th and 42nd Minesweeper flotillas berthed in the basin , while two tankers <a href='uninflect' title='3'><mark>were</mark></a> berthed inside the Normandie dock . The 6th and 7th U @-@ boat flotillas , commanded by Kapitänleutnant Georg @-@ Wilhelm Schulz and Korvettenkapitän Herbert Sohler respectively , <a href='uninflect' title='4'><mark>were</mark></a> permanently based in the port . It is not known how many submarines <a href='uninflect' title='5'><mark>were</mark></a> present on the day of the raid . The submarine base <a href='been_done' title='6'><mark>had</mark></a> been inspected by the U @-@ boat Commander in Chief , Vizeadmiral Karl Dönitz , the day before the raid . He asked what would they do if the base was subject to an attack by British Commandos . Sohler replied that " an attack on the base would be hazardous and highly improbable " . 
The Kriegsmarine ( German navy ) had at least three surface ships in the Loire estuary : a destroyer , an armed trawler and a Sperrbrecher ( minesweeper ) , da latter bein tdaguard ship fir the port . On thdaight of thedaid it was also four harbour defence boats and ten ships from the 16th and 42nd Minesweeper flotillas berthed in the basin , while two tankers was berthed inside the Normandie dock . The 6th and 7th U @-@ boat flotillas , commanded by Kapitänleutnant Georg @-@ Wilhelm Schulz and Korvettenkapitän Herbert Sohler respectively , was permanently based in the port . It ain't known how many submarines was present on the day of the raid . The submarine base done been inspected by the da-@ boat Commander in Chief , Vizeadmiral Karl Dönitz , the day b4 the rda . He asked what would they do if the base was subject to an attack by British Commandos . Sohler replied dat " an attack on the badawould be hazardous and highly improbable " .