- Jan 31, 2018
Great picture and photo, how did you Jim!Your calculation is based on standard barometric pressure, air temperature and a flat calm sea. The barometer was very high the temperature was almost at zero and there would have been a long, low swell in the area. These factors would when on the crest of a swell, increase the visibility range of lights.which means the range of visibility was greater than normal.
You also assume that Rostron was not on the raised platform at the rear of his bridge or that in fact, the lookouts spotted the green light first then Rostron and his men saw it subsequently because they knew exactly where to look for it.
I suggest you look at the numbers once again.
If we accept Rostron's given position at 00-40 am and an estimated average speed of 15 knots, then Carpathia covered a total of 30 miles in those 2 hours. However, she did not cover it in the intended direction of North 52 West, but made good a course of about North 45 West.
By calculation, Carpathia was 48.62 miles South East of the sinking Titanic when she turned. If she covered 30 miles toward the sinking vessel by 2-40 am then at that time, she had 18.62 miles still to run on a course of North West until she arrived beside Boxhall and his green lights.
If Rostron was up in the observation platform then his height of eye was at least 70 feet.
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And if Boxhall was standing in the same position as was Lowe in boat 14 with arm raised, and the pyro-stick held as high as possible,then the center of the flare would have been about 12 feet above sea level. In such a case, the normal extreme range would have been about 15 miles. However, it was not a normal night. The barometer was extremely high and the temperature abnormally low. These would add at least a couple of miles onto the extreme sighting range. Then, of course, there is the possibility of a speed a little more than 15 knots helped by a push from the North Atlantic Current. One thing is for absolute sure...Carpathia was not influenced by a south setting current.
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