Radar's Convoy Modifier

[HBG GW Enthusiast]

On page 31 of the rules, 7.8 Technologies, Radar states, “Escort ships gain +2 to their escort modifier roll.” On page 43, Table 9-8, Convoy Modifiers reads, “+2 if having Radar Technology.”

Do I need to have a ship assigned to escort duty to gain the +2 convoy modifier from Radar, or is that +2 inherent in the convoy line itself? From Table 9-8, I had thought that once I had researched Radar, then a normal submarine raiding an unprotected convoy line was now just a flat roll (because both sides were adding +2). But now I suspect I was wrong, and just misunderstood Table 9-8. I think the “+2 if having Radar Technology” convoy modifier is incorrect. “Escort ships gain +2 to their escort modifier roll” means you must assign a ship to escort duty and the submarine must be raiding in that particular sea zone where there is an escort assigned. This makes Radar less valuable than I originally thought for ASW, and the rules should be edited.

Something needs to be fixed here. Either 7.8 Radar on Page 31 should read, “Defending convoys gain +2 to their convoy escort modifier roll” -OR- Table 9-8 should read “+1 per escorting surface warship in the sea zone (+2 if having Radar Technology).” I suspect the latter.

[Noneshallpass]

In addition to rule 7.8, which clearly says that with Radar “Escort ships gain +2 to their escort modifier roll” if you look at the Technology Reference Sheet (v3.0) :

As soon as a nation develops ASW technology, it gets the following advantages: Defending
convoys gain a +1 to their convoy raiding roll. (…)

Radar gives the nation the following advantages:
Defending convoys gain +2 to their escort modifier roll

My understanding is that in the case of ASW the +1 applies to the D6 roll regardless of escorting ships. In the case of radar, it is not +2 to the convoy line, but per escorting warship.

I think that you are correct that the table 9-8 is misleading when it says only “+2 if having rardar technology”.

[HBG GW Enthusiast]

@noneshallpass Always appreciate your thoughtful responses, Noneshallpass! Great point about the Technology Reference Sheet. That’s conclusive evidence that Table 9-8 just needs a little tweak. I might also change the Technology Reference Sheet to say “Escort ships” in lieu of “Defending convoys.”

[Trig]

@hbg-gw-enthusiast
It appears that has been changed in the Errata.

[HBG GW Enthusiast]

@trig Ok, I see how it works now.

With Radar, defending convoys gain +2 to their convoy raiding roll.

With Advanced ASW, defending convoys gain +1 to their convoy raiding roll, but also get the free defense roll at “2” on a D12. Also, Advanced ASW improves Naval Transports by allowing them to defend at a “1” on a D12, allocating any hit to attacking submarines.

Both technologies are good against submarines.

[Noneshallpass]

Ok, with the new correction to page 31 in the Errata, it seems that table 9-8 was correct and is now is in line with the Technology Reference Sheet for Radar.

Then, I am not sure why both rule 7.8 and Tech sheet ASW mention “+1 to their convoy raiding roll” and Radar “+2 to their escort modifier roll” if these mean exactly the same thing (your D6 convoy roll per rule 9.1 and table 9-8).

So if you have both technologies, then I guess you roll D6 +3, which might try to compensate if the raider has advanced subs at +4.

[HBG GW Enthusiast]

I finally had time to sit down and write out proposed rules as clearly as possible. Please critique and offer suggestions.

Page 31, 7.8 Technologies, Advanced ASW
“Defending convoys gain +1 to their convoy escort modifier roll.” For clarity, would recommend eliminating “escort”. Should read, “Defending convoys gain +1 to their convoy modifier defense roll.”

Page 31, 7.8 Technologies, Radar
With the current errata, the rule reads, “Defending convoys gain +2 to their escort modifier roll.” For clarity, would recommend changing “escort” to “convoy.” Should read, “Defending convoys gain +2 to their convoy modifier defense roll.”

Global War Tech Sheet, Page 1, Advanced ASW
“Defending convoys gain a +1 to their convoy raiding roll.” Would recommend eliminating “a”. For clarity, would recommend changing “raiding” to “modifier”. Should read, “Defending convoys gain +1 to their convoy modifier defense roll.”

Global War Tech Sheet, Page 2, Radar
“Defending convoys gain +2 to their escort modifier roll.” For clarity, would recommend changing “escort” to “convoy.” Should read, “Defending convoys gain +2 to their convoy modifier defense roll.”

Table 9-8 is perfect and needs no corrections.

[Trig]

@hbg-gw-enthusiast Looks decent, the only thing I might do is add the word “defense” as convoying is an attack. So it would read “… convoy defense roll.”

[HBG GW Enthusiast]

@trig said in Radar's Convoy Modifier:

@hbg-gw-enthusiast Looks decent, the only thing I might do is add the word “defense” as convoying is an attack. So it would read “… convoy defense roll.”

Yes, that’s a good idea! Edited, above. Thanks, Trig!