Numbers / Measurements bottom of Deckplans


Eef Janssen

Member
Dec 12, 2017
5
0
11
Hi,

I'm new to the forums all tho I've been visiting the site for a long time for info about the Titanic. I have a question that kept me searching, but can't seem to find the answer to. Hopefully there is someone who can tell me the answer.

What are the numbers on the bottom of the deckplans? Titanic Deckplans
upload_2017-12-12_23-7-10.png

I've looked into it, the length over all in those numbers would reach 162 on the aft and a little over 158 on the fore/forward making it a sum of 320 The numbers don't indicate feet as the over all length is 882 1/2 feet.
320 yards = 960 feet - so it's not yards
320 meter = 1050 feet - so it's not meters

They should be around 2 feet and 9 inches each - but couldn't find any measuring term for that kind of size

Anyone have any ideas on this?
 

Doug Criner

Member
Dec 2, 2009
428
44
133
USA
The "overall length" that you are measuring is not the ship's LOA, length overall. The LOA is the length between perpendiculars at the extreme stem and stern.
 
  • Like
Reactions: 1 user

Eef Janssen

Member
Dec 12, 2017
5
0
11
The "overall length" that you are measuring is not the ship's LOA, length overall. The LOA is the length between perpendiculars at the extreme stem and stern.
Thank you for the reply, it says its 850' between perpendiculars - if I take the line it is 157 till forward and a bit shy of 149 on the aft side - making it a sum of 306 - if that would be yards it would be 918 feet still to high for the 850' it stated
upload_2017-12-13_0-59-17.png
-
upload_2017-12-13_1-1-33.png

* it should say LOA (Length Over All) instead of OAL (Over All Length)

Please correct me if I'm looking at it the wrong way, I'd love to understand.

And I'm still looking for the measurement unit the numbers represent

upload_2017-12-13_0-58-11.png
 

Dave Gittins

Member
Apr 11, 2001
5,016
248
333
The problem is that there were two definitions of Length Between Perpendiculars.

The builder measured it from the aft edge of the sternpost to the point where the stem cut the water at the designed draft. On Titanic, that was 850 feet. The Board of Trade and Lloyd's Register measured it from the aft edge of the sternpost to the point of the stem at the beginning of the bowsprit (if fitted). On Titanic this was 852' 6". The Length Overall was 882' 9".

The numbers on the bottom of the drawing are frame numbers on 27" centres.
 
  • Like
Reactions: 1 user

Eef Janssen

Member
Dec 12, 2017
5
0
11
The problem is that there were two definitions of Length Between Perpendiculars.

The builder measured it from the aft edge of the sternpost to the point where the stem cut the water at the designed draft. On Titanic, that was 850 feet. The Board of Trade and Lloyd's Register measured it from the aft edge of the sternpost to the point of the stem at the beginning of the bowsprit (if fitted). On Titanic this was 852' 6". The Length Overall was 882' 9".

The numbers on the bottom of the drawing are frame numbers on 27" centres.
Thank you for your reply and making me understand
 

Stephen Carey

Member
Apr 28, 2016
116
44
73
Philippines
The distance between frames at the fore and after ends were (and still are on most ships) less than the main body of the ship. The fore and after ends are the "panting area" where the wave action on the ship is greater than the parallel mid body. In this clip from a Bruce Beveridge drawing, you can see the increasing/decreasing frame spacing at the after end of the ship.

Frame numbers.jpg
 
  • Like
Reactions: 1 user

Similar threads