Thread Tools Search this Thread Display Modes
Old 03-05-2017, 10:25 AM   #1
City: Hampton
Join Date: Jan 2017
Posts: 18
390 Davit mounting

I'm looking for information about mounting davits to the upper deck of my 390. Specifically for mounting photos. I haven't found any detailed photos online. If you have this type of setup, I would love to see your mounting system.

I'm using Martek 600 davits.

Thanks for your time.
Attached Thumbnails

0025 is offline   Reply With Quote
Old 03-05-2017, 10:46 AM   #2
DHeckrotte's Avatar
City: Philadelphia, PA
Vessel Name: Revel
Vessel Model: 1984 Fu Hwa 39
Join Date: Nov 2015
Posts: 1,021
Interesting idea.

My first thought is toward weight distribution and stability. Add a motor... And rainwater.

My second thought is toward dynamic loading; it's one thing to mount the davits on the hull where you could hope to rest assured that things are heavily-built. It's quite another to follow the loads down through a structure that is relatively lightly-built.

My third thought is to go back to the manufacturer, even though a 390 is an older model, and there were several versions of that boat over the years, and the ownership of the mfr has changed (I recall).

And last, I Googled 'Mainship 390' images and note that there appears to be a variety of arrangements of metal support posts under the flybridge overhang, from none to two of various appearances of heftyness and location. (Your pictured boat has three.) Adding posts of the correct heft and connection to hull below and through the flybridge to the davit is probably the key bit of engineering, presuming the stability is not an issue.

DHeckrotte is offline   Reply With Quote
Old 03-05-2017, 01:42 PM   #3
dhays's Avatar
City: Gig Harbor
Vessel Name: Kinship
Vessel Model: North Pacific 43
Join Date: May 2015
Posts: 8,656
Originally Posted by DHeckrotte View Post
Interesting idea.
My first thought is toward weight distribution and stability. Add a motor... And rainwater.
That just looks scary. The weight isn't any higher than if the boat was sitting on the boat deck, but still.... There is a lot more motion up that high than down below, putting a lot more stress on the davits and the supporting structure.

The other question I have is how would you clear the swim step when lowering the dinghy?

SPOT page
dhays is offline   Reply With Quote
Old 03-05-2017, 05:10 PM   #4
Keysdisease's Avatar
City: South Florida
Join Date: Sep 2014
Posts: 807
That's actually a pretty common davit arrangement found on lots of 390's. I don't recall any conversation about any issues, and if I has a 390 that's the davit system I would want

Keysdisease is offline   Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

» Trawler Port Captains
Port Captains are TF volunteers who can serve as local guides or assist with local arrangements and information. Search below to locate Port Captains near your destination. To learn more about this program read here: TF Port Captain Program

All times are GMT -5. The time now is 07:10 AM.

Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012