The pilot's camera at all unarmed (without weapon means) UAV can not turn on the night vision mode. This is after updating 1.76 and in DEV 1.77.
https://community.bistudio.com/wiki/File:B_UGV_01_F.jpg
https://community.bistudio.com/wiki/File:B_UAV_01_F.jpg
https://community.bistudio.com/wiki/File:O_UGV_01_F.jpg
https://community.bistudio.com/wiki/File:O_UAV_01_F.jpg
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and other UAVs of this type