[Leandros]

Departed Lorient 090715.

See captain's log. Proceeded to patrol area with a swing towards Gibraltar. Continued southwards. Very little traffic. None in the designated patrol area. Return voyage with another swing towards Gibraltar. Bad weather with strong winds, heavy rain and visibility 350-450 meters. Detected a large convoy on an easterly course, destination Gibraltar. Weather still bad, low visibility. Was jumped twice by escorts in the bad weather. Obviously radar-equipped. Crash-dived but had both guns destroyed. Never able to make the convoy due to the heavy escort. After a slugging match withdrew with 21% HI. Returned Lorient. Arrived 262055.

Zaunkønig tests quite satisfactory. When used properly approx. 75% success rate. However, they seem to develop an attitude problem in the Commander in that it is too "easy" to accept a duel with the escorts, at the same time taking up space for anti-merchant torps. It is a principal question that has to be decided upon whether one boat in a pack should primarily be assigned to anti-escort duty or if the same number of torps should be distributed among all the boats, giving all the chance of better self-defense.

Anyway, if several boats are operating in the vicinity of each other with the ZK's they can create the danger of "friendly fire". Before introduced into general use there is a need for proper regulations and procedures.