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#1
posted to rec.boats.cruising
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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 |
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#2
posted to rec.boats.cruising
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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 |
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#3
posted to rec.boats.cruising
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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. |
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#4
posted to rec.boats.cruising
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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 |
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#5
posted to rec.boats.cruising
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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. |
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#6
posted to rec.boats.cruising
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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 |
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#7
posted to rec.boats.cruising
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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 |
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