A few naval hats

 A few Naval Hats

Probably one of the most distinctive of historical naval headwear is the Bicorn, initially adopted by fashion-conscious officers it went on to become an official uniform item. Worn by the French, such as Napoleon with the corners in line with the shoulders, it was worn by the Navy Fore and Aft.

Admiral Nelson

Late 18th/Early 19th Century 

Late 19th Century 

This hat continued as state dress for the flag ranks of the Royal Navy for over two hundred years, until it was replaced in 1960. 

When Mountbatten was killed in 1979 his Bicorn along with his naval sword was placed on his coffin.

Some examples in museum collections

https://www.canterburymuseum.com/collections/collection-highlights/lightbox/36

https://www.rmg.co.uk/collections/objects/rmgc-object-71222

https://www.rmg.co.uk/collections/objects/rmgc-object-71585

Other Headwear 

Although the Bicorn is iconic thanks to great naval heros like Nelson, other forms of Naval headwear were also worn.

https://collections.vam.ac.uk/item/O1408648/commander-welch-royal-navy-photograph-brown--wheeler/

https://collections.vam.ac.uk/item/O1246227/the-sailors-tear-sheet-music-waller/