Hi,
I am trying to decipher a passage from the German book ‘Chronik Aller UC-Boote’ which describes a patrol of UC48 in the English Channel, Bristol Channel and Irish south coast

Can anyone offer an explanation of the figures in brackets which follow the ship names?
In the case of WARNOW they correlate to her length in metres and tonnage, but for most of the others that looks very suspect; I think it makes sense that the second figure is tonnage, but am puzzled by the first.

“The minefields laid off Dartmouth, Berry Head and Plymouth were useless, however the submarine still had her other weapons of torpedoes and gun.
On the 1st May off Lands End she eliminated the French fishcutter RAYMOND ESTHER (-;20), and the next morning off Trevose Head the British freighter WARNOW (83;1593) was sunk, with 14 deaths. Similarly, the fishing cutter UNITED (00; 61) disappeared in the deep. Off the Irish coast on the 5th May the encounters with the British steamers GRETA (03; 297) and FELTRIA (91; 5254), took 45 men to their deaths. Two days later off Wolf Rock the British steamer KINROSS (11; 4120) was lost to a torpedo hit.”