Also had to look it up, but it’s important to note that the map refers to two of the stops on the Empire Cruise voyage around the world that Hood led in 1923-24 in Sierra Leone and Trincomalee, Sri Lanka.

Source – Cruise of the Special Service Squadron on Wikipedia

Edited for formatting.

PCCSantos said:

Also had to look it up, but it’s important to note that the map refers to two of the stops on the Empire Cruise voyage around the world that Hood led in 1923-24 in Sierra Leone and Trincomalee, Sri Lanka.

Source – Cruise of the Special Service Squadron on Wikipedia

Edited for formatting.

So that's what Hood refers to on one of her wedding dress lines.

Chuy88 said:

So that's what Hood refers to on one of her wedding dress lines.

Good God, I think you’re right!

Update: Upon further research, I think this also alludes to why Hood is the flagship/icon on the Cruise screen in the game and many of the ports on the map refer to actual stops on the cruise.