There were several different suffix code warning signals that were used in WW2.
SSS. Was submarine
RRR. Was surface raider as in decoy freighters with false deck cargo crates hiding weapons.
QQQ, (Q ship) WWW, AAA etc.
 I remembered some of them from my Radioman days and reading about them.
This link has great information… under Later Developments..

https://en.m.wikipedia.org/wiki/SOS

73 de K4NCG 
Tom

Sent from my iPhone

On Sep 27, 2022, at 12:32 AM, Charles Pfister <[email protected]> wrote:


SSS is the WW2 distress call when the emergency
involves an attack by enemy submarine. 
(I hope my source is correct.)

Charlie Pfister WD8AXB 


On 09/26/2022 9:05 PM W2HX <[email protected]> wrote:


I came across this item on ebay

https://www.ebay.com/itm/265903930626


On the right, it seems there is a selector for “SOS”, “SSS” or “KEY” I am making an assumption that KEY allows a person to transmit a message of their choice using a KEY. The SOS I assume sends an automated SOS signal. What is SSS? I know earlier in morse CQD was a distress signal. What is SSS?


73 Eugene W2HX

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