# Improvement bonuses are '''hidden'''. The increase in stats are not reflected on the stat cards of ship girls.
# Improvement bonuses are '''hidden'''. The increase in stats are not reflected on the stat cards of ship girls.
#* This means they do not affect [[Support Expedition]]s or hitting [[OASW]] thresholds.
#* This means they do not affect [[Support Expedition]]s or hitting [[OASW]] thresholds.
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#* Exceptions are equipment such as the [[Type 2 Recon Aircraft]] and [[61cm Quad (Oxygen) Torpedo Mount Late Model]] that give additional '''visible''' fit bonuses to certain ship girls when improved.
# Equipped equipment cannot be improved.
# Equipped equipment cannot be improved.
#* There is an option to unequip the equipment from the improvement list.
#* There is an option to unequip the equipment from the improvement list.