The testing of the fuel range of the boats was done with the game's "Estimated fuel range" button. Time does not permit testing by running all boats until they are out of fuel, due to all of the other testing involved. We can lower the "fuel levels" for the next version so that you can run out of fuel much sooner though. As a side note, the S-Boats had a 5,000nm range in the 1920's, prior to the use of ballast tanks as "dual-purpose". Prior to WWII, their range was at least 8500nm. Most of the "listing" you see for the historical data also does not denote the most efficient speed setting. They will usually have something like "Range: 8500nm at 10knots" or some-such, and when you do 6 knots, your actual range might list as 11,500nm. Now, whatever you guys do, don't try to run the batteries dead... you can't do it...
Departing from Cavite and Mariveles will be a future choice for an add-on mod. But if you read some of Silent Victory, most of the boats would receive maintenance and be re-fit in the Navy Yard at Cavite / Sangley Point (USS Canopus), then moved to Manila for docking and supplying (USS Holland), just due to the fact that they had too many boats for Cavite to handle. Thus, the Stock game's use of Manila Harbor as the starting location, and FotRSU kept it, adding the bases at Cavite and Mariveles for future use. Note the "confusion" that can be involved with this as you come back to "Home Port" in Manila Harbor, where you'll see three messages about docking on your way back in. Mariveles (USS Otus) was used as a "turn-around", where fuel and some supplies were available, which is why some boats started there. One SubDiv was assigned to Cavite. One to Manila Harbor, but most started from the harbor docks. Cavite was bombed to destruction on December 10, 1941, and Manila Harbor was abandoned before the New Year, with any further attempts at preparing submarines for patrol moving to Mariveles, but only for a little while, and it too had to be abandoned, and what remained of supplies was moved to "The Rock" on Corregidor at the South Dock. The USS Holland and USS Otus left the Manila Bay area on December 10, while the USS Canopus was left in the Manila Harbor for re-fit / re-supply, painted to look like part of the docks from an aerial view. It went to Mariveles for Christmas, and was then scuttled in early April, 1942. One of several things we can't do with the mod is have you start any and all patrols in the Manila area after December 10, 1941 submerged during daylight hours, which is what they did then, surfacing only during the night for topside maintenance and departure.
