The Oberon class submarines memorial, Rockingham. Plague next to the fin of HMAS Orion. The image was taken approx a month after the Inaugural Lost Submariners Memorial Service at the location.
<a href="//commons.wikimedia.org/wiki/User:Calistemon" title="User:Calistemon">Calistemon</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>