my home port is Pearl and they are always sending me to honshu island Japan, and the distance is about 6500 or 7000km after Mid Way (don't know the exact distance) so it's pretty far and the fuel supply is not enough to reach at that patrol area even in 1/3 speed

so i have to dive use my batt. then surface recharge the batt. in 1/3 speed when batt.'s gets full dive again and this continiunes... and this is a total time killer and i reach that point about 1 month later

if i don't do that, reaching to that patrol area is a fantasy with fuel reserve in hand so anybody has any idea to how i get that patrol area or what is your strategies when sailing to really far distances ??
can you give me advices how can i go without losing a month just for traveling in my patrols
P.S : using 1.3 patch and no mods my sub is a Gar type