Events are taking place across the country to remember the members of "the forgotten service" - men and women killed in action while working for the Merchant Navy.
During World War Two, the Merchant Navy were a vital link between a cut-off United Kingdom and the rest of the allied forces. They carried food, arms, ammunition, troops and other supplies.
It was highly dangerous work, especially in the Atlantic.
The Merchant Vessels were usually only lightly armed, and were a key target for German U-boats.
seamen and women served in the Merchant Navy during WW2
died in action
One man who signed up to work on a ship aged just 14 remembers putting the danger to the back of his mind.
You had U-boats all around you, the danger was there, but whilst you were at sea and working, it was at the back of your mind. I was a boy, doing what I was told for a great crew.
Donald's local Merchant Navy Association in Dumfries and Galloway has been working tirelessly to mark Merchant Navy Day.
51 red ensign flags are flying throughout the county - the biggest flag showing anywhere in the UK.
They did save the country. It was a deadly occupation, they did not know if they were going to make it. We decided we would do our bit. Two years ago we managed 14 flags in Dumfries and Galloway, last year we had 24. This year, thanks to the fantastic efforts of my colleagues, we've managed to fly 51.
You can watch the full interview by Lise McNally below: