The Navy's technical term for it is a "white hat", but sailors have long referred to it as a "Dixie Cup" because when worn it looks like an ice cream dixie cup. The Navy briefly changed to...
I believe the answer is IASCARS.
Muziam Nanas
lascar, a sailor from India or SE Asia: early 17th century: from Portuguese lascari, from Urdu and Persian laškarī 'soldier', from laškar 'army'
proa