Tuna Door Questions

The friendliest place on the web for anyone who enjoys boating.
If you have answers, please help by responding to the unanswered posts.

janice142

Guru
Joined
Oct 12, 2011
Messages
1,238
Location
USofA
Vessel Name
Seaweed
Vessel Make
Schucker mini-trawler
Practically forever I've intended to install a tuna door. It's not getting any easier to climb over the transom. Three knee surgeries (both knees could be better) and, well, I consider a tuna door to be a safety feature.

Now I've found a fellow who can do the job. He's coming by to give an estimate this coming week.

What I do not know is about hardware -- I've seen lots of variations on boat show boats. I've been wanting a tuna door forever and a day. I've searched at nautical flea markets for the brackets/gizmos.

So, what do I need?

The doorway will be 18" square, give or take. I believe (correct me if I'm wrong!) that it should open out, maybe. I guess. Inward might be okay too.

Picture:
HeadingWest.jpg


I've got a swim platform back there. The opening will be from the center to port. My doorway into the cockpit is center to starboard. I do not want to tumble back and out!

Both sides of the cockpit have locker/seats in the corners. This is looking aft through my doorway:

AlgaeFollows.jpg




What say the experts?
 
No expert, but the krogen door is centered.
Just normal stainless steel 4 screw hinges.
 

Attachments

  • 20170313_173947.jpg
    20170313_173947.jpg
    89.3 KB · Views: 122
  • 20170313_174013.jpg
    20170313_174013.jpg
    93.7 KB · Views: 120
Thanks Richard... yours does look nice and I note that it opens outbound.

Center won't work aboard Seaweed. I've got the wind-gen support post (which doubles as the davit support too) dead center. Wires for the charging outlet are on the starboard side too. I also installed a license plate light on that side so I can light up the swim platform for Skipper.

It's good to know how many bolt holes your hinges have. I'll be sure to mention that.

Benthic2... you're probably correct. I Prefer to buy the materials for all projects as I can control the quality. I do not yet have an estimate so this job is not written in stone. My usual method is to gather all the parts together first.

As the gent is busy I will have time to do buy the hardware before he gets to me -- provided I can afford him! That's not a given, you know? The latch part interests me too. I've seen a variety at the boat shows. Some look sturdy and others don't. I have no idea where to buy the good ones.
 
I consider a tuna door to be a safety feature......(.So do I at 76 years old.)

I believe (correct me if I'm wrong!) that it should open out, maybe.I guess. Inward might be okay too. (That would be my choice after having a transom door that opened out.)
My old boat, SeaHorse II, had a Tuna door that opened out and I almost fell over board several times.(The latch didn't work properly and the door would swing open when underway) My preent boat's Tuna door opens in and it's much safer.

Photo #1 SeaHorse II's Tuna door.
Photo #2 Sandpipers Tuna door.
 

Attachments

  • IMG_5113.jpg
    IMG_5113.jpg
    106.1 KB · Views: 145
  • FullSizeRender-6.jpg
    FullSizeRender-6.jpg
    199 KB · Views: 141
Janice, Interesting project. I can certainly understand why you want a transom door. A few considerations:

Opening out and hooking in the open position saves space.

Do you significantly weaken the back of your boat by cutting a piece out of the transom? Did your mfg ever offer this option? There are doubtless ways to stiffen the opening. Probably been done before - don't reinvent the wheel.

The hinges need research, especially if you transom is curved or slopes. Check the older Bertram sportfishers. They had great hinges and a simple robust latch that clearly showed it was in the open or closed position.

Keep us posted on your progress.
 
I believe (correct me if I'm wrong!) that it should open out, maybe. I guess. Inward might be okay too.


Ours opens inward.

Since we carry our dinghy on a davit system mounted on the swim platform... an outward-opening transom door could have become an issue for us.

-Chris
 
Judging by the posts here, there is no right or wrong way the door swings. Mine swings out and is centered. Honestly I can't imagine my Marine Trader without it. I have no fear o it opening underway and/or falling overboard as it is very secure.

Make sure you have references from the guy who will be doing the job. You will want to know how many he has done and what he recommends for your situation.

Good luck! I hate hiring out. Gives me loads of stress!! LOL!
 
Ours opens out also. A few years ago we had some stress cracks at the transom and the door itself at the hinges. We removed the hinges to reenforced the attachment points. What a pain to get the hinges re-aligned properly so the door hung correctly. Here some pictures of the hardware.

Larry, Healhustler did a readical mod to his door a few years ago. There may be some info in there you can use. Here's the link.

http://www.trawlerforum.com/forums/s16/radical-manatee-transom-door-mod-21156.html
 

Attachments

  • IMG_0174.jpg
    IMG_0174.jpg
    122.9 KB · Views: 82
  • IMG_0175.jpg
    IMG_0175.jpg
    130.7 KB · Views: 88
Quick outward opening door story....
Several years ago at Block Island we were with another couple in our rubber dinghy headed to shore for dinner at Dead Eye Dick's friend with a 42 Post was docked at Payne's and we thought we'd land the dinghy there rather than put the dink on the beach and get everyone's shoes full of sand, etc.
So the other couple's wife stands up to open the transom door so we could get in...she freaks when the door opens out, falls back onto my wife and knocks both of them into the water.
Of course there is always a dock crown there and they give my wife a standing ovation because she comes up out of the water with her glass (was rum and coke) still pointing upward. LOL
Of course we still went to dinner....the guys dry and the girls soaked with salt water that never dries out. LOL BTW it was kazoo night and we had a great time)
Hence I would vote for an inward opening....
 
Our door opens inward and the side opposite the hinges is angled so there is no hardware needed to keep it from swinging too far and no stress on the hinges in that regard. I don't have any photos handy but I will try and get some when I get out to the boat. I particularly like the latch that holds the door open.

Ours is centered but I don't think having it centered or offset makes any difference. Do what works best in your application.
 
You may want to consider which side you dock on and how you tie the stern.

Our Mainship had the door to stbd which works well as that's the most convenient side to tie up (helm door only on stbd).
I decided to add the lower stern cleat to allow crossing my stern lines and not block the door swing - or being a tripping hazard when boarding.

I also wanted to add Weaver davits for my inflatable which I place to port - works well as it still leaves room to board with the dingy on place and raised.

Many considerations and only you and the installer can make the final decision.

Good luck w/ the project - as always - pics at least when complete
 

Attachments

  • Boat 2013_9_6 C.jpg
    Boat 2013_9_6 C.jpg
    79 KB · Views: 85
  • IMG_1359C.jpg
    IMG_1359C.jpg
    140.4 KB · Views: 86
On downcast boats these doors are common. Popular consensus is that outward swinging doors are stronger and easier to make watertight. Of course these are often tuna boats that back down on fish regularly.
 
I found some of the door parts on my BOM - here are a few you might want to check out / consider.

The hinges were listed as Gem - they sell marine hardware but I don't have a part# but their catalog is online.
 

Attachments

  • 1012005.jpg
    1012005.jpg
    21.4 KB · Views: 427
  • 1012007.jpg
    1012007.jpg
    20.2 KB · Views: 82
  • 1009158.jpg
    1009158.jpg
    23.7 KB · Views: 72
I always thought opening outward, and having a taper to the sides of the door so that IF water was forced up onto the door (from wave action) the door was forced into the hull rather than onto the hinges and latch made sense.

If I were able to mount a transom door that is the method I would use.
 
Our door is centered and opens inward. No problems with that and I think I'd prefer that over an outward opening door. With a door that opens out you would have to unlatch it then step aside so it could open. With the inward opening door you unlatch it and walk through the opening as you swing the door in. Much easier IMHO if you have your hands full. (Don't you always have something in your hands when you go down to the boat?)
 
GFC;545414 With the inward opening door you unlatch it and walk through the opening as you swing the door in. Much easier IMHO if you have your hands full. (Don't you always have something in your hands when you go down to the boat?)[/QUOTE said:
I had no idea how many opinions there would be on this subject!
I also have a side door that we use constantly. (We never use the Tuna door.)

Photos shoe the angle on the Tuna door making it absolutely impossible to open out. The side door makes it much easier to board the boat from the dock.
 

Attachments

  • IMG_0764.jpg
    IMG_0764.jpg
    69.1 KB · Views: 86
  • IMG_0673.jpg
    IMG_0673.jpg
    93.1 KB · Views: 84
Here's another approach (probably not for your boat however)

10115-albums347-picture3658.jpg
 
Is there a semantic difference between "tuna door" and "transom door?"

I commonly see them used interchangeably. Sometimes Tuna Door on a fishing boat and Transom Door in a cruising boat. I was once told that the traditional Tuna Door does not open at the gunwale and only opens with the gunwale completely connected.
 

Attachments

  • TunaDoor.jpg
    TunaDoor.jpg
    6.6 KB · Views: 694
I commonly see them used interchangeably. Sometimes Tuna Door on a fishing boat and Transom Door in a cruising boat. I was once told that the traditional Tuna Door does not open at the gunwale and only opens with the gunwale completely connected.


Thanks.
 
On some boats, the transom provides structural rigidity to the hull. You may want to confirm that your transom door won't impair that rigidity.
 
Hi, Janice. Pardon the off topic post but I know exactly where those photos of Seaweed were taken! The ICW from St. Petersburg to Tarpon Springs is my cruising grounds. I definitely see the convenience of a tuna door on your boat. I look forward to seeing the final product.
 
Greetings,
I agree that a properly engineered door that opens outward would not be forced open if slammed by a big wave BUT Ms. J shouldn't be out in conditions that would allow that to occur. So, my vote would be inward opening with two sturdy latches
 
Our transom was already cut out and there was a makeshift door in the opening so I didn't have the cut out from the transom . The door I made is in two pieces with the caprail section that hinges on top of the caprail and straddles the door that opens to the inside . It's a funky design but it's all I could come up with . The door center panel is a piece of 1/2 " starboard.
 

Attachments

  • IMG_2777.jpg
    IMG_2777.jpg
    96.8 KB · Views: 59
This below, think about the large opening, if you are just bay cruising shouldn't be an issue, but in the ocean a lot of flexing goes on and cracks will form without proper reinforcement of the opening.
On some boats, the transom provides structural rigidity to the hull. You may want to confirm that your transom door won't impair that rigidity.
 
A transom door that opens outward will likely function as a huge scupper if you take a breaking wave into the cockpit. I would expect many latching mechanisms to fail under such load which would be of great benefit.
Not of any interest for her purposes, just a comment.
 
My old boat, SeaHorse II, had a Tuna door that opened out and I almost fell over board several times.(The latch didn't work properly and the door would swing open when underway) My preent boat's Tuna door opens in and it's much safer.

Falling out is a concern. Thanks.

Opening out and hooking in the open position saves space.

Do you significantly weaken the back of your boat by cutting a piece out of the transom? Did your mfg ever offer this option? There are doubtless ways to stiffen the opening. Probably been done before - don't reinvent the wheel.

The hull strength is a concern. A friend has cut a full size tuna door in the back of his 40' Schucker. He mentioned reinforcing and that it was a relatively easy project.

That man is skilled though!
His opening is wider and taller than mine will be.

There was no tuna door option in any of the Schuckers though many now have them.

Ours opens inward.

Since we carry our dinghy on a davit system mounted on the swim platform... an outward-opening transom door could have become an issue for us.

That is another concern. Thanks Chris.

Make sure you have references from the guy who will be doing the job. You will want to know how many he has done and what he recommends for your situation.

Good luck! I hate hiring out. Gives me loads of stress!! LOL!

I'm fortunate there Donna. He's busy, which is a good sigh.
And he has a reciprocating saw and is not afraid to use it.

Best of all, while chatting he'd mentioned that the previous weekend he'd had to repair the transom of his son's outboard fishing boat. He talked about "removing rotting core" and "strengthening the transom" and how the boat was now better than when new.

The next door neighbor has known Chris for decades and trusts him.
But Chris is busy.

Therein lies the problem. I have hopes. First though another neighbor has a job that is line before mine.

I do have high hopes though Donna. This has literally been on my list almost since I bought Seaweed nine years ago. It's the next-to-last safety feature I want. An autopilot will have to wait because this is more important in my view. At least for another year or two.

Ours opens out also. A few years ago we had some stress cracks at the transom and the door itself at the hinges. We removed the hinges to reenforced the attachment points.

The fellow Schucker owner (Seaweed is a Schucker) did talk about reinforcing the opening. I'll keep that in mind. Thanks!

I decided to add the lower stern cleat to allow crossing my stern lines and not block the door swing - or being a tripping hazard when boarding.

I also wanted to add Weaver davits for my inflatable which I place to port - works well as it still leaves room to board with the dingy on place and raised.

Moving a cleat is a great idea. I'd not thought of that. Thanks!!!

And being able to lift Algae is also a consideration though I don't leave her on the swim platform. It's more important to be able to board Seaweed from the water. Too many boats have no way to get back aboard.

On some boats, the transom provides structural rigidity to the hull. You may want to confirm that your transom door won't impair that rigidity.

Noted. That is important MYTraveler. I'll keep that in mind.

The thinking is that rather than have one that is full height I'll go with 18". That way it won't be so large. The opening will not be so close to the water. I can step over a shorter bulkhead.

A straight walk through (level with the cockpit) is too low in my opinion. I want to step over.

Greetings,
I agree that a properly engineered door that opens outward would not be forced open if slammed by a big wave BUT Ms. J shouldn't be out in conditions that would allow that to occur. So, my vote would be inward opening with two sturdy latches

Thanks RT... Although initially I was leaning outbound opening, I am back to inward. It just seems simpler. Angles so the door will open will also prevent water from coming in.

Our transom was already cut out and there was a makeshift door in the opening so I didn't have the cut out from the transom . The door I made is in two pieces with the caprail section that hinges on top of the caprail and straddles the door that opens to the inside . It's a funky design but it's all I could come up with . The door center panel is a piece of 1/2 " starboard.

This is ABSOLUTELY what I want. Thank you so much Pack Mule for the great idea. I'd not considered having a caprail AND a tuna door. This just makes so much sense.

Thank you for showing me what I did not know I needed.
 
This is ABSOLUTELY what I want. Thank you so much Pack Mule for the great idea. I'd not considered having a caprail AND a tuna door. This just makes so much sense. Thank you for showing me what I did not know I needed.
Janice, you're the absolute best!:thumb:
 
Janice, you're the absolute best!:thumb:

Aw shucks... Thank you Walt.

It is definitely the knowledge base on Trawler Forum that sets this site apart from others. I wish I was half as smart as some of the boaters here. We are blessed to have so many who take the time to participate.

As for me and this project, I am looking forward to seeing the finished result on Seaweed. Still don't have an estimate though. Finding the right person with talent and time is key. I am fortunate.

Thanks for all the above advice. I've been measuring in the cockpit and making plans.

Your friend in the east, J.
 

Latest posts

Back
Top Bottom