Where modern temperature control improves older warships

Would modern temperature and humidity control improve the consistency and accuracy of pre-Second World War ships?

Yes in heat-sensitive cases such as Prince of Wales's ammunition and tropical submarines, though many ships already managed magazines carefully.

Many prewar navies already worked hard to regulate magazines, so a modern system would not improve every ship equally. HMS Prince of Wales and her 40 mm ammunition provide an example where controlled storage conditions could improve consistency. Tropical submarines faced an immediate requirement because crews could not simply open the hatches while operating submerged. The Royal Navy's XE craft had air conditioning for Far Eastern missions, where the original X-craft arrangement was unsuitable.