The category "<ship_name>" can be expressed as follows:

<ship_name>

ardent

arleigh burke

atlanta

cardinal

cole

conolly

detroit

elrod

flipper-1

flipper-2

flipper-3

flipper-4

flipper-5

gunston hall

hayler

inchon

ingersoll

kearsarge

lcac twenty five

lcac twenty four

lcac twenty three

lcac two five

lcac two four

lcac two three

lcu one six six five

lcu one six six four

lcu one six six three

lcu sixteen sixty five

lcu sixteen sixty four

lcu sixteen sixty three

leyte gulf

miami

monongahela

montpelier

moosbrugger

nashville

nicholas

nicholson

oriole

osprey

pelican

pensacola

pioneer

portland

ramage

rhib-1

rhib-2

rhib-3

rhib-4

rhib-5

roosevelt

saipan

shreveport

stout

taylor

theodore roosevelt

thorn

vella gulf