Originally Posted by Seaworthy Lass
Close encounter with a sub here. Heart is still pounding having briefly stopped.
4:15 am and I am on watch. Pitch
black night. I hear the distinctive rumble of a sub on our port side. Five minutes later odd very bright lights pop up to starboard.
What lights do subs display?
PS I know I am edgy when catching sight of the rising moon then makes me jump!
In 1997 I sailed on a yacht through a submarine exercise area off of North West Scotland
and was hailed by a British warship, 12 miles to the east, and requested to alter course.
It was early evening with no engine
running, sailing in a force 6 wind
Some 10 minutes later we were subject to a mighty low pitched rhythmic acoustic noise
loud enough to disturb the crew below deck
. This lasted about 2 minutes.
It was not the doorbell style "ping" shown in submarine movies, but a mighty high decibel level, cabinet rattling base sound.
There was nothing visible on the surface and no further communication with the warship.
Those were the facts and here is my interpretation:
Presumably we were being "pinged" by a submarine.
Scary. as trawlers in the western Scottish and Irish Sea areas have been sunk by being towed backwards and foundering.
It is well known that submarines use the noise
to hide from pursuers by steaming underneath the surface ship and it's acoustic shadow.
A 12 metre yacht with no machinery operating, and correspondingly quiet, would present an ideal exercise opportunity to a submarine and a sonar blast will locate it.
hulled ship would not feel the sub's sonar used to position itself underneath as a yacht would.