What is it?

[Goldie fish]

Was in Cork Dockyard again last weekend,camera in hand,and I noticed this while taking Photos of L.E. Aoife in Drydock.
Anyone Know what the bulge and fin are?

[Lordinajamjar]

xxxxx

[Goldie fish]

Ok..my fault,i was not clear enough. Aft of the thruster,and the anodes,on the keel there is an obvous bulge,with a stub fin(which appears to be masked in orange tape in the photo)
What is the bulge/fin?

Careful with the smartass answers....

[Lordinajamjar]

xxxxx

[tashkugan]

could be hull mounted 3d search light sonar -- as fitted to most swanky bottom trawlers (very handy for wreck finding).

[hptmurphy]

Its the passive Sonar/depth gauge used for taking depth readings. Nothing fancy ....just tells you haow far away the bottom is.Eithnes sonar is carried in a large housing about the size of a pool table and is retractaable. Yeah this is a depth finder!. Looks abot right as it is a t the part of the ship that moves least just behind the bridge.

[Kieran]

a part of the hull prehaps

[Goldie fish]

Originally posted by Kieran
a part of the hull prehaps

prehaps you should go and lie down..

[yooklid]

And let Goldie trample you.

[Stoker]

Bulge and Fin ?

It is the transponder for the echo sounder, the hull is too fine at that point to fit it in so they had to build a special housing which you refer to as a "bulge". The orange tape is just to mask the transponder so it is not painted over.

[Kieran]

thank you, i belive i shall

[Lordinajamjar]

xxxxx

[Goldie fish]

I don't know...this wasn't a quiz...it was an inquiry. I guessed it was some sort of sonar,but i had not noticed the same feature on Emer,who also lacks the bow thruster.
Thanks to the in house experts for their assistance.

[fiannoglach]

Negative, It's actually a Casting Recovery Horn for clandestine insertion or recovery of divers. Notice the high viz glint tape surrounding the horn, which protect the device while out of the water.

[hptmurphy]

You must be ****ing joking !