[John Pancoast]

Originally Posted by gap

I have not any document close by hand - Padi probably can be more detailed on this respect - but yes, there are a few accounts of smoke screens being used for convoy protection against submarines, though their main employment was indeed in surface engagements and during amphibious operations. Their usage was quite common during both World Wars, but it gradually rarefied with the progress of radar technology in mid-to-late WWII.