Changes

For resource gain:

For resource gain:

** In 2-3, you have a one-in-eight chance of fighting three battles (CHIK), with the other seven-eights being two-battle routes. Assuming no retreats, the average consumption for a single submarine in 2-3 is therefore just over 2 fuel per sortie, and 4 ammo

* In 2-3, you have a one-in-eight chance of fighting three battles (CHIK), with the other seven-eights being two-battle routes. Assuming no retreats, the average consumption for a single submarine in 2-3 is therefore just over 2 fuel per sortie, and 4 ammo

**Fuel nodes A, E and I can give 15-45 fuel, while ammunition nodes D and J can give 20-45 ammo.

**Fuel nodes A, E and I can give 15-45 fuel, while ammunition nodes D and J can give 20-45 ammo.

***Route A-B-E hits two fuel nodes, getting an average 60 fuel.  

***Route A-B-E hits two fuel nodes, getting an average 60 fuel.  

***You have a 37.5% chance of hitting an ammunition node. Both ammunition nodes average just over 30 ammo.

***You have a 37.5% chance of hitting an ammunition node. Both ammunition nodes average just over 30 ammo.

****The gross ammo income of an orel cruise is hence 30 multiplied by 37.5%, or approximately 12 ammo, rounding up as the actual ammo average is higher than 30.

****The gross ammo income of an orel cruise is hence 30 multiplied by 37.5%, or approximately 12 ammo, rounding up as the actual ammo average is higher than 30.

 

*The principle behind Orel cruising resource gathering is to achieve negative sortie costs (i.e. net resource gain).

The principle behind Orel cruising resource gathering is to achieve negative sortie costs (i.e. net resource gain)

** Pure submarines have a consumption total of 10 fuel and 20 ammo (i.e. 1 fuel and 2 ammo per battle node), with the exception of Maruyu who consumes 10 ammo

* Pure submarines have a consumption total of 10 fuel and 20 ammo (i.e. 1 fuel and 2 ammo per battle node), with the exception of Maruyu who consumes 10 ammo

***Consider a single submarine (e.g. Ro-500) going to orel, assuming no retreats, will have an average gross expenditure of 2 fuel and 4 ammo, while collecting an average 45 fuel and 12 ammo.

***Consider a single submarine (e.g. Ro-500) going to orel, assuming no retreats, will have an average gross expenditure of 2 fuel and 4 ammo, while collecting an average 45 fuel and 12 ammo.

*Three submarines going to Orel are approximately ammo-neutral (slight net expenditure), while collecting somewhat under 40 fuel per sortie.

*Three submarines going to Orel are approximately ammo-neutral (slight net expenditure), while collecting somewhat under 40 fuel per sortie.

| Notes = Branching here is (almost) completely random

| Notes = Branching here is (almost) completely random

}}

}}

=== Tips ===

=== Tips ===

* A fleet with CVL is more likely to go to node K.

* A fleet with CVL is more likely to go to node K.

** 33 or more (using formula 33; at least 70.4 for 2-5 fall formula) guarantees H to L

** 33 or more (using formula 33; at least 70.4 for 2-5 fall formula) guarantees H to L

* [[Akashi]] can drop with a small chance in 2-5, but only for Admirals who have do not have her yet in their base. If you already have her, she will not drop in this map anymore. However, Akashi is still obtainable in maps like 3-5 or 6-2.

* [[Akashi]] can drop with a small chance in 2-5, but only for Admirals who have do not have her yet in their base. If you already have her, she will not drop in this map anymore. However, Akashi is still obtainable in maps like 3-5 or 6-2.

*Alternatively, if you do not want to go through the trouble of locating Akashi in 3-5 or 6-2, you can choose to scrap [[Akashi]] after you remodel her and take her repair facilities, and then return to 2-5 until she drops again. The game will treat it as if you do not own her.

**Alternatively, if you do not want to go through the trouble of locating Akashi in 3-5 or 6-2, you can choose to scrap [[Akashi]] after you remodel her and take her repair facilities, and then return to 2-5 until she drops again. The game will treat it as if you do not own her.

===Tips===

===Tips===

*** High leveled ships are required

*** High leveled ships are required

*** Night battle node can force retreats easily, especially at high levels.

*** Night battle node can force retreats easily, especially at high levels.

If attempting the monthly nightmare quest (Bm7):

If attempting the monthly nightmare quest (Bm7):