WHAT IN THE NAME OF MARINE ENGINEERING IS THIS?

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aaronbocknek
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WHAT IN THE NAME OF MARINE ENGINEERING IS THIS?

Post by aaronbocknek » Sat Apr 18, 2015 4:58 pm

hey all. brad and i went to the bay bridge boat show yesterday and had a great time. out of all the vessels there, our favourite was the DEFEVER 46 pilot house trawler. brad loved the galley and all the storage areas, and i loved the engine room, complete with workbench and tool drawers. though it was not a walk in engine room, there was plenty of room to move around and access all systems. one of the most unusual items in the engine room is this box, fabricated out of thick fiberglass and raised above the water line. the top is a thick plexiglass bolt on hatch to view the seacocks attached at the bottom. there is a screen attached to the bottom to act as a strainer. for the life of me, i cannot figure out the name of this device. can anyone out there assist? is this an 'AQUA BOX'? i've never seen this set up before. also, ALL the overboard thru hull fittings above the waterline have ball valves on them, i guess for ocean crossings? thanks guys/gals. much appreciated. (the attached picture came from a search of pre-owned defever boats world wide as i did not have my cell with me yesterday)
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1982 F-36 TRI CABIN ENTERPRISE
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prowlersfish
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Re: WHAT IN THE NAME OF MARINE ENGINEERING IS THIS?

Post by prowlersfish » Sat Apr 18, 2015 5:14 pm

Its called a Sea Chest
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Re: WHAT IN THE NAME OF MARINE ENGINEERING IS THIS?

Post by larryeddington » Sat Apr 18, 2015 7:58 pm

Is the idea everything draws its water from one supersize strainer?
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Re: WHAT IN THE NAME OF MARINE ENGINEERING IS THIS?

Post by prowlersfish » Sat Apr 18, 2015 9:00 pm

Basicly yes
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Big D
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Re: WHAT IN THE NAME OF MARINE ENGINEERING IS THIS?

Post by Big D » Sat Apr 18, 2015 10:54 pm

Never seen one of those before. Looks a lot like a custom shower sump as I've seen several similar to that and was going to post that thought until I saw "genset" written on it.
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Re: WHAT IN THE NAME OF MARINE ENGINEERING IS THIS?

Post by aaronbocknek » Sun Apr 19, 2015 6:54 am

thanks for the input guys. i first saw one a few years ago on a flemming trawler. i've done some research since yesterday and found a ton of info on it.
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Re: WHAT IN THE NAME OF MARINE ENGINEERING IS THIS?

Post by prowlersfish » Sun Apr 19, 2015 10:46 am

Big D wrote:Never seen one of those before. Looks a lot like a custom shower sump as I've seen several similar to that and was going to post that thought until I saw "genset" written on it.
I am kind of shocked that you had not seen one . But then again I have only seen maybe 2 in person as they are most offer only on very large Vessels . Mostly I have seen them I yachting magazines . A friend on my dock has a 49' Defever that has a sea chest along with a very roomy engine room .



Any boat/yacht that has one is waaaaaaaay out of my price range
Last edited by prowlersfish on Sun Apr 19, 2015 11:05 am, edited 1 time in total.
TROJAN F36 Conv.
6BTA Cummins diesels
Life is to short for a ugly boat :D
2009 TROJAN RENDEZVOUS
Port Kinsale 2010 & 2011. Solomons get together 2011.

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Re: WHAT IN THE NAME OF MARINE ENGINEERING IS THIS?

Post by Big D » Sun Apr 19, 2015 11:05 am

Might be more common on bigger vessels in Georgian bay north of here. More trawlers up there too. Have worked on several boats up there but none had these. On my lake the biggest boats go to about 55' and are typically domestic brands except for perhaps Viking. Is that something some other domestic brands use?

So if I understood right, machinery like engines, air, generator, etc, draw raw water from this one location?
She was a 1969 36 ft wooden beauty with big blue 440s that we'll miss forever.
And thanks to the gang, 2012 Trojan Boater Of The Year

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Re: WHAT IN THE NAME OF MARINE ENGINEERING IS THIS?

Post by prowlersfish » Sun Apr 19, 2015 11:14 am

Big D wrote:Might be more common on bigger vessels in Georgian bay north of here. More trawlers up there too. Have worked on several boats up there but none had these. On my lake the biggest boats go to about 55' and are typically domestic brands except for perhaps Viking. Is that something some other domestic brands use?

So if I understood right, machinery like engines, air, generator, etc, draw raw water from this one location?
Yes all water is pulled from that one location . I don't think you will find them on many sub 60'boats I was surprised to see it on the 49 Defever . I believe Viking may use them on larger boats (60+ ) .
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Re: WHAT IN THE NAME OF MARINE ENGINEERING IS THIS?

Post by kevinz » Sun Apr 19, 2015 11:15 am

It is called a sea chest. all sea water cooling water goes thru it. Great safety idea. Just one hole in the bottom of boat is much better than a bunch.
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Big D
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Re: WHAT IN THE NAME OF MARINE ENGINEERING IS THIS?

Post by Big D » Sun Apr 19, 2015 11:19 am

So the box goes all the way through the hull?
She was a 1969 36 ft wooden beauty with big blue 440s that we'll miss forever.
And thanks to the gang, 2012 Trojan Boater Of The Year

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prowlersfish
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Re: WHAT IN THE NAME OF MARINE ENGINEERING IS THIS?

Post by prowlersfish » Sun Apr 19, 2015 11:30 am

Yes its really part of the hull , it has a grate below . The top is above the water line ( on the defever ), so you could remove it to clean , But the there is no way I would . something about a 12"x12"+ hole thru the bottom scares me . And if I was wrong ........... :mrgreen:

BTW I look at some Vikings on yacht world (well over 60' ) And I did not see a sea chest .
TROJAN F36 Conv.
6BTA Cummins diesels
Life is to short for a ugly boat :D
2009 TROJAN RENDEZVOUS
Port Kinsale 2010 & 2011. Solomons get together 2011.

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Big D
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Re: WHAT IN THE NAME OF MARINE ENGINEERING IS THIS?

Post by Big D » Sun Apr 19, 2015 11:35 am

That's different
She was a 1969 36 ft wooden beauty with big blue 440s that we'll miss forever.
And thanks to the gang, 2012 Trojan Boater Of The Year

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Re: WHAT IN THE NAME OF MARINE ENGINEERING IS THIS?

Post by prowlersfish » Sun Apr 19, 2015 11:47 am

Defever 50 You can't tell by the photo but this is not at center of the hull
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TROJAN F36 Conv.
6BTA Cummins diesels
Life is to short for a ugly boat :D
2009 TROJAN RENDEZVOUS
Port Kinsale 2010 & 2011. Solomons get together 2011.

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Re: WHAT IN THE NAME OF MARINE ENGINEERING IS THIS?

Post by lawyerdave71 » Tue Apr 21, 2015 12:42 pm

Looked like a booze cooler to me! Ha ha ha
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