The Battle for the Atlantic (Pathfinder Magazine, 1943)
The attached is an uncredited article from the later days of 1943 concerning the continuing struggle for supremacy of the North Atlantic:
It was plain to see that due to the Allied tactics which drove the U-boats from the seas last summer, sinking 90 subs in 90 days, something new had to be added… the newer [German] subs have larger conning towers, painted white this time instead of black – packing at least two new guns, and shooting it out in the open instead of from ambush… Brazil has recently reported 11 sinkings in the South Atlantic.