I think he meant directly outside of the boiler rooms. Yes, that indicated where the sea level would be, like how there are (were) numbers at the tip of the bow, counting down from just above the red paint. One to 42. 42 feet above the keel.What red paint?
I was going to ask that myself. I never heard of the waterline being marked (painted) inside. But it does bring up another question. Maybe you or Jim knows this. Did Olympic class ships water line change much between being fully loaded and empty? I know it wasn't something like an oil tanker riding high when empty but how would one know where the waterline was inside?What red paint?
Sorry for the delay and apparent bad description...I was referring to Titanic Honour and Glory simulation. They show red paint on the lower exposed hull in the boiler rooms. I’ve also noticed this paint on a cutaway large scale model. It seems to match the waterline?I think he meant directly outside of the boiler rooms. Yes, that indicated where the sea level would be, like how there are (were) numbers at the tip of the bow, counting down from just above the red paint. One to 42. 42 feet above the keel.
View attachment 49535.
Also, the paint was red, because it was anti-fouling paint, to prevent the water from eroding the paint away.
You need to ask the developers of that simulation where they got that from, or why the put that in. As far as I know, there was no reason to have a line painted on the inside hull of the vessel. The waterline is not constant but changes as supplies and coal are used up on a voyage. The change in displacement in long tons per inch immersion (TPI) was listed by H&W, Titanic's builders, at 143.8 tons per inch. At her load draft of 34 ft. 7 in. the ship weighed 52,310 tons. It was estimated by Wilding that by the night of April 14th the ship weighed 4,026 tons less because of the consumption of coal and supplies by that point. The derived a mean draft at the time of collision was therefore 28 inches higher that her load draft leaving Southampton, or 32 ft. 3 in. on the night of April 14th.I was referring to Titanic Honour and Glory simulation.
Dado?
Thanks for that info...very informative. I figured it probably wasn't that dramatic as some of the ships I was able to see in my brief stint as a sailor. Some ships I saw looked so high out of the water they looked almost unstable to me. But I'm sure they would correct that later with ballast or something. 28" wasn't very much compared to some of the tanker and cargo/container ships I saw.You need to ask the developers of that simulation where they got that from, or why the put that in. As far as I know, there was no reason to have a line painted on the inside hull of the vessel. The waterline is not constant but changes as supplies and coal are used up on a voyage. The change in displacement in long tons per inch immersion (TPI) was listed by H&W, Titanic's builders, at 143.8 tons per inch. At her load draft of 34 ft. 7 in. the ship weighed 52,310 tons. It was estimated by Wilding that by the night of April 14th the ship weighed 4,026 tons less because of the consumption of coal and supplies by that point. The derived a mean draft at the time of collision was therefore 28 inches higher that her load draft leaving Southampton, or 32 ft. 3 in. on the night of April 14th.
There were two paint systems on a ship's external hull... the anti-fouling and the boot-topping line. The latter ran along the top of the antifouling, separating it from the black of the upper hull. On Titanic, I believe it was narrow and gold.Thank you Samuel. I refer to the red paint on the outer hull as being "the waterline" as well. Is that incorrect? Or is it simply more resilient paint on the whole lower hull?
I heard a bunch. They were CONSTANTLY repainting, no doubt the North Atlantic temperature and sea spray did a number.. Was probably a bunch on OlympicInteresting. Thanks. I'm sure it was different for different parts of the ocean...ie tropics and such. But how often would a ships hull have to be cleaned for say Olympic class liners operating in the north? On average if there was such a thing?
Thanks. I had to go look that up on why they did on ships. Interesting.I believe it was painted as a dado.
Ok thanks for the reply. I should have been more specific. I meant how often did the hull need to be cleaned from marine growth? Like barnacles and such.I heard a bunch. They were CONSTANTLY repainting, no doubt the North Atlantic temperature and sea spray did a number.. Was probably a bunch on Olympic
(Makes me think of the picture of the giant scrape along her hull, from the dock.. The captain wasn't used to dealing with a big girl like her)