CD guns and river

[Skyland]

In my mod, i have added some CD guns units along Yangtze river (CD units in Wusih hex and Nanking hex).
I have made several tests but allied ships are never engaged by those guns.
How to make them working ?
Am i missing something ?
Thanks

[Yaab]

Ctrl+F the manual for "narrow strait". Narrow straits make mines hit ships, help CD fire at ships and make riverine combat happen. Don't know how you define river hex as narrow strait though.

[Skyland]

According to the manual :

4.2.1.4 NAVIGABLE RIVERS
Navigable rivers are rivers that ships may “sail” along. In map terms, they are river hexsides
that naval TFs can move across. Navigable rivers have the following effects and limitations:
» The hexsides have effects on naval units that are similar to narrow straits – TFs
crossing them are more vulnerable to mines and any CD units that are present.

But the guns never fire in my tests.

[Yaab]

You would have to redefine the river hexes as narrow strait. Then the Yangtze guns should fire just like Fort Drum in the narrow strait leading to Manila.

[btd64]

What about gun size and depression? I would think smaller guns would work better. My 2 cents....GP

[Skyland]

ORIGINAL: Yaab
You would have to redefine the river hexes as narrow strait. Then the Yangtze guns should fire just like Fort Drum in the narrow strait leading to Manila.

Ok but according to the manual navigable river have the same effect as narrow straits on navals units.

@General Patton
I have 15cm, 12cm and 7cm guns in those CD units.

[el cid again]

This is an issue I have partially addressed for some years in RHS.
I can confirm it seems like CD units never want to engage. But, in fact,
they DO engage on the occasions they detect enemy ships in range. Also,
they (almost) always engage if the enemy actually conducts a landing in
the same hex as the CD unit is in.

What I found that mitigates the problem is the creation of a "spotter" device.
Note that there are two kinds of "spotters" in game terms - you need to NOT
use an "aircraft spotter" for the CD unit to engage ships. A spotter is,
functionally, a surface search radar with a low detection probability and a
short range (never more than the visual horizon, or about 16,000 yards).
If you provide every battery with its own spotter - a CD unit with several
batteries has a significant chance of detection of ship targets. Since
my spotters are 10% effective, a CD unit with 5 batteries (common) has
a 50% de facto cumulative rating.

Another related invention is the "river boom" - see The Sand Pebbles to see
what one looks like. This is an extremely slow composite "naval unit" armed
with numbers of light weapons - and also with spotters. It should have a
maximum speed of 1, and a cruising speed of 0 (which means it will move 1 hex
per day at cruising speed, 2 per day at full speed). It should have durability
= to the number of hulls present. Arm it as you think weapons available warrant.
Put in the same hex as a CD unit, it greatly increases the chances an enemy
TF will be engaged. Apparently the friendly units "talk to each other" to some
degree, increasing the chances the force is detected.

[GetAssista]

ORIGINAL: el cid again
This is an issue I have partially addressed for some years in RHS.
I can confirm it seems like CD units never want to engage. But, in fact,
they DO engage on the occasions they detect enemy ships in range.

On a related note, I wonder what is different with Russian CD guns in game? They are by far the meanest and they never have any kind of radar/spotter device.
I was able to bombard every notable US/British/Aus CD-equipped base in the AI game almost with impunity from 16+ distance. In fact I was able to keep AI San Francisco with 130+ units inside shut down with BB bombardments against SF fort + Manila fort + Subic Bay + assortment of US CD units. Them hardly ever fired.
But those Russians... They always fire hundreds of shots and wreck my bombardment TFs. That's how CD units should behave. is it possible to make other CD units behave like Russian?

[Yaab]

I remember Seydlitz being hit hard by some Russian CD units in his Nomonhan Redux AAR. That was 5-6 years ago. Maybe the Soviet CD units are bugged?