Remarkable, Incredible and Amazing nerdiness
The Rubys count each 10m of the base as a ‘level’ – it even works like this in the lifts. The dock, therefore has a 100m high space to allow a large sailing ship to cruise in with its masts. The map for Level 01 hence applies, it would just be seen from further remove.
Berthed at Key 5 is The Volcano: an early 18th century warship that has been upgraded. It is fully capable of operating in traditional manner. GM: Also capable of running by battery motor for several days. It also has a holofield generator that is capable of disguising the ship at distance as a standard commercial ship, not a military capable vessel. Illustration here shown sailing some distance out but still in sight of Ruby Base on the horizon.
The elevator going up to the rest of the base from the loading dock goes 40-50 metres. There are four entrances, all going into the same lift.
GM: The doors open by a simple PIN number. In the early 19th century the Rubys don’t really have to worry about brute force cracking from anyone living there, so only four digits. In old school mobile keypad terms, the pass PIN is of course 7889 or R-U-B-Y. Anyone with access to late 20th or 21st century technology that has met the Rubys and their egos has a good chance of realising what this pin number might be.
4) A giant metallic seeming sea craft is berthed here. GM: Level 01 is the submarine dock as can be clearly seen. Other key descriptions to follow.
Level 0 as such would be this grid, seen from below, just a hull outline, partially submerged.
GM: Descriptions and details with Level 1. If players encounter via entering underwater in 1800s terms they see the bottom of a seacraft of unknown type and made of something which seems possibly metallic, but also unknown, no obvious joins with slight symmertric ridges.
Or as the more egotistical mad scientist might call it ‘Ruby Base’. This is at about 1km scale hex. The island is approximately 2 standard ‘day travel’ wilderness hexes N-S. Volcanic terrain of course making that part somewhat tougher.
Added to here https://github.com/bluetyson/Dungeon23-Mokuy/tree/main/Lord%20Howe%20Island