I found the lyrics for this song which is song (among others?) by Dermot O'Brien.
Can anyone help me with the meaning of the DCs in the first line???

Dungarvan, My Home Town

There's a spot in the DCs, a place dear to me
Where the comrades are keeping a watch o'er the sea
And though far I have wandered yet wherever I roamed
It's the place I love dearest, the place I call home.

Chorus

Dungarvan, my home town I love best of all
Dear old faces and places sure oft I recall
In my heart I keep wishing some day I will be
Back again in Dungarvan, my home by the sea.

On the bridge I will linger at sweet even tide
Just to gaze o'er the waters that home there inside
Happy memories come stealing as the soft shadows fall
On the fishing boats anchored there beside those sheer wall.

How I treasure each token of days that I knew
In the town of sweet memories where friends are so true
And I thank God in Heaven producing for me
My old home town Dungarvan, my home by the sea.