ENI 02323909 and ENI 02332894.  The <a href="https://en.wikipedia.org/wiki/blue_sign" class="extiw" title="w:blue sign">w:blue sign</a> can be seen on the <a href="https://en.wikipedia.org/wiki/starboard" class="extiw" title="w:starboard">w:starboard</a> side of the cabin, indication an intention to pass on the starboard side
<a href="//commons.wikimedia.org/wiki/User:Raymond" title="User:Raymond">Raimond Spekking</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>