You don't need me to tell you that on a warship, a fire, attack, or mishap does not wait for you to change clothes. It does not only endanger those who have the right NECC.
ICYMI last month from NavyTimes:
The video released Thursday — which had been requested a week earlier by Navy Times — shows the Oct. 15 flame-resistance test, which compared the blue-and-gray NWUs with other services’ combat uniforms. Strips of each fabric were hung and exposed to flame for 12 seconds. Testers then measured the results.
The video first shows the flame-resistant organizational gear used by the Marine Corps. It behaved as rated — the fire went out immediately once the flame was removed and the fabric didn’t melt.
The NWU is the second fabric tested. It’s exposed to flame at the 19-second mark in the video. Twelve seconds later, the external flame is removed; the fabric is already engulfed in flames.