I remember assignment cards printed just before the "War Years" had certain Bronx companies that didn't relocate while others almost always did. For instance, in the Bronx, Engines 38, 41, 42, 43, 48, 50, 81, 83, 88, 89, 90, and 94 did a lot of relocating while Engines 45, 46, 52, 60, 61, 63, 64, 68, 70, 71, 73, 75, 79, 82, 92 and 97 were almost always covered. E41 relocated to 36, 58, 68, 91, 92 and 94. E42 relocated to 36, 45, 60, 62, 63, 71 and 79. E43 covered 45, 46, 68 & 84. E48 covered 60, 61, 62, 63, 71, 92, 93 & 97. E50 covered 69, 73, 82 & 92. E81 covered 63, 68, 75 & 95. E83 relocated to 60, 64 & 73. E88 relocated to 45, 46, 70, 75 & 92. E89 relocated to E64, E90 relocated to 45, 46, 75, 79 and 82. E94 relocated to 45, 60, 71 & 73. E96 relocated to 73. Ladder companies were more of a mixed batch although some like L17, 31, 39, 52, & L53 didn't relocate.