Sprinkler Systems on Cargo ship question.
 

This summer while sailing on the St. Lawrence I was passed by a bulk
carrier. The deck hatches were closed, as one would expect, however the
deck was being sprayed by a sprinkler system from bow to aft superstructure.

Since then I have noticed several similar vessels, also with deck
sprinklers running full tilt.

What is the purpose of this?

Cheers
Martin

Sprinkler Systems on Cargo ship question.
 

"Marty" wrote in message
...

This summer while sailing on the St. Lawrence I was passed by a bulk
carrier. The deck hatches were closed, as one would expect, however the
deck was being sprayed by a sprinkler system from bow to aft
superstructure.

Since then I have noticed several similar vessels, also with deck
sprinklers running full tilt.

What is the purpose of this?

Cheers
Martin


? testing the fire suppression system?

--
"j" ganz @@
www.sailnow.com

Sprinkler Systems on Cargo ship question.
 

"Capt. JG" wrote in message
easolutions...
"Marty" wrote in message
...

This summer while sailing on the St. Lawrence I was passed by a bulk
carrier. The deck hatches were closed, as one would expect, however the
deck was being sprayed by a sprinkler system from bow to aft
superstructure.

Since then I have noticed several similar vessels, also with deck
sprinklers running full tilt.

What is the purpose of this?

Cheers
Martin


? testing the fire suppression system?

--
"j" ganz @@
www.sailnow.com



If the water is fresh in that part of the river (I know where the St
Lawrence river is but that's about it) they may be taking advantage to wash
off the salt.

Sprinkler Systems on Cargo ship question.
 

mmc wrote:
"Capt. JG" wrote in message
easolutions...
"Marty" wrote in message
...
This summer while sailing on the St. Lawrence I was passed by a bulk
carrier. The deck hatches were closed, as one would expect, however the
deck was being sprayed by a sprinkler system from bow to aft
superstructure.

Since then I have noticed several similar vessels, also with deck
sprinklers running full tilt.

What is the purpose of this?

Cheers
Martin

? testing the fire suppression system?

--
"j" ganz @@
www.sailnow.com



If the water is fresh in that part of the river (I know where the St
Lawrence river is but that's about it) they may be taking advantage to wash
off the salt.



Not likely, in each case they were downbound. It was hot, I thought
maybe they were keeping their cargo cool,,, does one need to keep wheat
cool?

Just read this from boatnerd.com

"Hogging is a term used when a vessel is bent up in the middle due to
any number of factors. On the Great Lakes this happens to vessels in hot
weather where the upper part is heated more than the submerged part.
Thats why you see boats with sprinkler systems spraying cool water over
the decks to reduce this hogging. It can also happen with the uneven
distribution of the cargo during loading or discharge (sometimes to
catastrophic results) where the major portion of the cargo is at the
ends of the boat i.e. for'd or after holds"

Learn something new everyday!

Cheers
Martin

Sprinkler Systems on Cargo ship question.
 

"Marty" wrote in message
...
mmc wrote:
"Capt. JG" wrote in message
easolutions...
"Marty" wrote in message
...
This summer while sailing on the St. Lawrence I was passed by a bulk
carrier. The deck hatches were closed, as one would expect, however the
deck was being sprayed by a sprinkler system from bow to aft
superstructure.

Since then I have noticed several similar vessels, also with deck
sprinklers running full tilt.

What is the purpose of this?

Cheers
Martin

? testing the fire suppression system?

--
"j" ganz @@
www.sailnow.com



If the water is fresh in that part of the river (I know where the St
Lawrence river is but that's about it) they may be taking advantage to
wash off the salt.

Not likely, in each case they were downbound. It was hot, I thought maybe
they were keeping their cargo cool,,, does one need to keep wheat cool?

Just read this from boatnerd.com

"Hogging is a term used when a vessel is bent up in the middle due to any
number of factors. On the Great Lakes this happens to vessels in hot
weather where the upper part is heated more than the submerged part. Thats
why you see boats with sprinkler systems spraying cool water over the
decks to reduce this hogging. It can also happen with the uneven
distribution of the cargo during loading or discharge (sometimes to
catastrophic results) where the major portion of the cargo is at the ends
of the boat i.e. for'd or after holds"

Learn something new everyday!

Cheers
Martin

Ha! Pretty wild.
Yep, the older I get the less I think I know.

Sprinkler Systems on Cargo ship question.
 

mmc wrote:

Learn something new everyday!

Cheers
Martin

Ha! Pretty wild.
Yep, the older I get the less I think I know.



More a case of the more I realize I don't know, a la Rumsfeld,, there
are known knowns, there are known unknowns, there are unknown knowns.....


Cheers
Martin

Sprinkler Systems on Cargo ship question.
 

On Tue, 23 Dec 2008 19:01:54 -0500, Marty wrote:

mmc wrote:
"Capt. JG" wrote in message
easolutions...
"Marty" wrote in message
...
This summer while sailing on the St. Lawrence I was passed by a bulk
carrier. The deck hatches were closed, as one would expect, however the
deck was being sprayed by a sprinkler system from bow to aft
superstructure.

Since then I have noticed several similar vessels, also with deck
sprinklers running full tilt.

What is the purpose of this?

Cheers
Martin

? testing the fire suppression system?

--
"j" ganz @@
www.sailnow.com



If the water is fresh in that part of the river (I know where the St
Lawrence river is but that's about it) they may be taking advantage to wash
off the salt.



Not likely, in each case they were downbound. It was hot, I thought
maybe they were keeping their cargo cool,,, does one need to keep wheat
cool?

Just read this from boatnerd.com

"Hogging is a term used when a vessel is bent up in the middle due to
any number of factors. On the Great Lakes this happens to vessels in hot
weather where the upper part is heated more than the submerged part.
Thats why you see boats with sprinkler systems spraying cool water over
the decks to reduce this hogging. It can also happen with the uneven
distribution of the cargo during loading or discharge (sometimes to
catastrophic results) where the major portion of the cargo is at the
ends of the boat i.e. for'd or after holds"

Learn something new everyday!

Cheers
Martin

Sure. For a coefficient of 6 ppm/ deg F., reasonable for iron or
steel,a 30 deg temp diff, gets you 1.3 inch for a 600 footer. Couldn't
see that with the naked eye. Waves deform ships to an obvious degree,
however.

Casady