flagships

/F L AE1 G SH IH0 P S/
noun
  1. 1

    (maritime) The ship occupied by the fleet's commander (usually an admiral); it denotes this by flying his flag.

  2. 2

    (maritime) The ship regarded as most important out of a group, e.g. a nation's navy or company's fleet.

  3. 3

    (by extension) The most important one out of a related group.

    โ€œThe retail company's store in London is their flagship.โ€

Source: https://en.wiktionary.org/wiki/flagship, https://en.wiktionary.org/wiki/flagships