This is a navbox template for U.S. Navy LST-542-class tank landing ships. Because of the large number of ships of this class, the template has features that help to minimize the size of the template on article pages.
where the optional parameter is the last number ending in "00" before the LST's hull number (i.e. for LST-701, use 700; for LST-1151, use 1100), the template can show a portion of the links, like this: