The only allied loss caused by the operation was Alan A. Dale.[9] Further operations between the 23rd and the 25th achieved no success and none of the 14 submarines deployed survived.[9] On the 27th the accidental release of a torpedo in the Voorneschen resulted in the sinking of 11 Bibers (although they were later recovered).[2] The three undamaged Bibers later sailed again; none returned.[10] An operation on the night 29/30 January resulted in damage to (much of it due to ice) or loss of most of the remaining Bibers.[9] Losses combined with RAF bombing prevented attacks from being mounted in February 1945.[9] The bombing had damaged the cranes used to move the Bibers into and out of the water.[11] Reinforcements allowed operations to continue until April 1945 but no successes were achieved and the Biber flotillas continued to take a very high rate of losses.[9] The last Biber mission was an attempt at mine laying and took place on the night of 26 April.[12] Of the four Bibers that took part, one ran aground and three were attacked by Thunderbolts, which sank two of them.[12]