Lightoller, Pitman, Ismay - are they telling the truth ?
Hello George,
This post is not quite up todate. Last Sunday or Monday i saw with pleasure that your final
results about the arrival time in New York came quite close to my own results, so i saw no
necessity to interfere.
Last year i had hard fights with Susanne Stoermer about the Tuesday-Afternoon-Hypothesis,
which seemed after rough calculations unbelievable to me. It took me all my strength and my
power to calculate this down without mercy.
Now about the questions in your post, which are still waiting for answer:
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>1. I am not sure about 21.5 knots. Lightoller said at any opportunity
>that the speed
>was 21.5 to 22 knots. (no specification whether over ground or through
>the water)
Yes, I know. For what it's worth, though, Pitman testified that Titanic had been making 21.5 knots for most of the 24 hours prior to the collision.
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As long as a ship is actually on its way the skippers cannot tell precisely the speed.
This depends on revolutions, current, wind, smooth sea or rough sea.
So they rely on their experience and say, considering all that items mentioned:
Probably the speed is somewhere between this and that. This is what Lightoller said.
To find out what the speed was indeed they need stellar and solar observations. They knew
afterwards how much they did, but never how much they were doing.
To assess whether Lightollers and Pitmans testimonies are correct i propose to look on the
daily runs of the Olympic as given by Simon Mills. To calculate the speed out of these
one has to be aware that the clock was set back every night by about 48 minutes.
Reason: The Titanic stepped forward 12 degrees longitude every day.
12° * 4 minutes = 48 minutes.
..........===Olympic===
..........mileage speed....time for speed calculation
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1. day....483.....20.6.....23.5
2. day....534.....21.5.....24.8
3. day....542.....21.9.....24.8
4. day....525.....21.2.....24.8
5. day....548.....22.1.....24.8
..........===Titanic===
3. day....546.....22.0.....24.8
I will set aside the first day, because this was not a full noon-to-noon day. The clock was
changed in a different way. (I am going to explain this in detail on another place.)
The average speed out of 2..5 is 21.7 knots, as Simon Mills has written.
Lighttollers statement 21.5 .. 22 knots is all right. At last we know that he is talking
about speed over ground.
What about Pitman, 21.5 knots during the last 24 hours ?
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What the Titanic exactly was doing he could not tell unless he knew the result of the
astronomical observations taken in the future.
I don't know whether he knew Lightollers position from 7.30 p.m. Sunday evening.
I don't know even whether he was on the Olympic on former trips.
May be he referred to the experience he gained from the Olympic and figured like this:
The Titanic made 22 knots from midnight til Sunday noon. The remaining 12 hours he relied
on the runs of Olympic, which made 21.2 knots. The average of 22 and 21.2 is 21.6 knots and
there we are. One cannot blame a sailor because he missed the speed by 0.1 knots.
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All i can say is that your figures do seem to make sense but that I'm having a lot of trouble reconciling your numbers with the testimony of the Titanic's
officers (who seem to have thought -- or at least *claimed* -- that Titanic was travelling slower than your figures indicate she actually did.) On the
other hand, though, none of the surviving officers breathed a word about any speed increases that Titanic underwent during those last few hours, so I
guess we shouldn't necessarily take their word about anything as gospel.
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I perfectly agree with you. In the opposite, one should consider why the officers said
what they said. Susanne once told me: "One has to be careful with Lightoller, because he is
not always telling the truth. On the other hand he takes much care not to lie."
We have evidences from Beesley, Stengel and Barrett that the speed was increased. I do not stick
on the time. It doesn't matter whether the revolutions where increased after noon or at 7 pm.
Why did Lightoller not mention it ?
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...none of the surviving officers breathed a word about any speed increases that Titanic
underwent during those last few hours.
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May i be allowed to ask a question to you:
Why should Lightoller breath words about things which nobody asked him for.
Lightoller said in the american testimony that he relieved the captain at 1 o´clock.
Asked about the speed at that time he said 21,5 .. 22 knots.
By my own calculations i found the average speed from noon to the disaster 22.1 knots
over ground or 23 knots through the water. Nobody asked Lightoller to specify this detail.
Eighty eight years of discussions show clearly that the increase of speed was suitable to
arouse high suspicion.
In german we say: "Keine schlafenden Hunde wecken!"
That means:"Do Not alert unnecessarily sleeping dogs!"
......(Hello Maureen, Tracy, i noted you understand German. Maybe you can give us a better translation.)
I can understand Lightoller.
Ismay
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Ismay said in his american testimony:
... as far as I am aware, she never exceeded 75 revolutions.
Senator Newlands asked: "What speed would 75 revolutions indicate ?" Ismay: "I should think
about 21 knots."
With my own calculations out of the first three day mileages and revolutions (70,72,75 rpm),
and taking into consideration the currents i found that 75 rpm correspond to 22.4 knots.
Asked for a statement whether Ismays testimony is correct i would answer (in german): "JEIN!"
Don't get a dictionary, you won't find it. It is a combination out of "Yes" and "No".
It means: Frank and from the first point of view 21 knots is not correct.
But thinking hard and putting enough interpretation upon one can find it is quite reasonable.
Ismay was neigther an engineer nor a sailor. He was a merchant, and he wanted to provide a
service with these requirements:
Departure ..Daunt Rock: .........Thursday, 3 p.m. english time, 10 a.m. New York time
Arrival ....New York Ambrose: ...Wednesday 5 a.m.
Time for passage: 6 days less 5 hours = 5 days 19 hours = 139 hours.
Speed = 2889 seamiles / 139 hours = 20.8 knots, round 21 knots.
Because of the gulf stream the minimum speed through the water is about 21.5 knots.
(daily currents estimated: -0.2, -0.4, -0.4, -1.0, -1.0, +0.5)
This applies for fine weather. Nobody can guarantee 6 fine days while crossing the atlantic.
Waves and storm are suitable to slow down the ship.
Solution: Use the fine days to save time by fastening 1 or 2 knots
(Olympic: 21.7 knots average over ground, 22.2 knots average through the water).
If all days are fine, than one can slow down the revolutions at the end of the journey.
If the last two days are rough, waves and storm will eat up the saved time, and hopefully
the ship arrives timely at 5 a.m. at Ambrose.
So the engineers will tell Ismay they have to design a machinery for at least 22 knots,
or better 22.5 knots to guarantee the average service speed of 21 knots. This machinery
makes 22.3 .. 22.5 knots through the water at smooth weather conditions.
And Ismay keeps in mind that he needs 75 rpm for 21 knots service speed.
So from his point of view his statement is correct.
On the other hand, Ismay gave all mileages and revolutions for the first three days.
The sum of his numbers and the 260 miles from the log (which IMO should have counted 270
miles ) meet exactly the distance from Daunt Rock to the wreckage. Presumed the information
about the clock was available as well (it was, Hitchens gave 47 minutes for the fourth night),
nothing more was necessary than take the mileage, divide by time and the knots will fall out.
Ismay gave all the information i needed to reconstruct mileages and speed as if i had found
the logbook.
all my best
Markus
P.S. Saw that you all left the engine room to go to Californians bridge to take some fresh air.
Probably because of coal dust and heat unbearable. Let's see how much time it takes to get you back here.