ORIGINAL: witpqs
Some targets are nasty porcupines and as I recall Truk is one of those. Better to start farther out.ORIGINAL: Lokasenna
ORIGINAL: BBfanboy
Truk can be tough once the forts are built large, but BBs can hurt the fort if they stand off far enough until the fort guns are disabled or they are out of supply.
I usually start with my BBs standing off at 18K and see how it goes. At that range Truk fort will rarely get a hit but will use lots of supply trying. I close in on subsequent bombardments by 2K intervals until the heat gets too much, then back out to the previous bombardment setting (+2K). It will take months of bombarding a couple of times a week to really suppress the fort. Keep bombing as well: fatigue becomes disruption becomes disablement becomes destroyed devices.
You don't even need to do this process.
Just look up the ranges of the guns that are at Truk. Order your ships to bombard from outside the range of the most numerous smallest caliber CD gun.
Although honestly, I mostly just set to 5K standoff and call it good. Works just fine. I haven't bombarded Truk that way, but I have done so to other heavily fortified bases (Saipan, for one, which has a similar coastal defense unit).
I guess I'm just not a fan of wasting time [;)].