For a start, I have assumed that the Carpathia started its north-westerly dash at 12.30am at a point slightly away from its deduced position: my method is the same as David Gittins on his website, and yields the same answer (not surprisingly!). I assume that the Carpathia was heading to the Titanic at 14 knots, as the oft quoted value

of 17 knots seems a mechanical impossibilty. Starting closer to the wreck site reduced the speed somewhat.

Now, we know roughly that the last of the Titanic's rockets was fired at 1.45am local time.

Now, this is where it gets slightly more maths driven. I don't know how far the Titanic's rockets reached, but I am guessing that it is between 600 and 800 feet. These give a distance to the visible horizon of 27.9 and 32.2 miles. The Titanic's slight trim of about 8 degrees at this point doesn't make much difference.

Now, someone on the Carpathia's bridge would be about 55 feet above the waterline; the lookouts would be about 75 feet above the waterline, giving a distance to the horizon of 8.5 and 9.9 miles respectively.

So, from the bridge, rockets fired to 600 feet could be seen at a distance of 27.9 + 8.5 = 36.4 miles. From the crowsnest, we have 27.9 + 9.9 = 37.8 miles.

For rockets reaching an altitude of 800 feet, we get the following: from the bridge, 40.7; and the crowsnest, 42.1miles.

This gives a range of values between 36.4 and 42.1 miles. However, at 1.45am, the Carpathia was now about 32 miles from the wrecksite - well within the distance over which the rockets could be seen, even though

they would be very low on the horizon. But all the officers on watch saw nothing.

Now this could mean one of any things: the Titanic's rockets didn't go up as high as specified above:

the DR position for the Carpathia at 12.30 is still wrong; she was travelling slower than 14 knots; the Titanic's rcokets were finished with before 1.45am (possible given that the times are rough); the time difference

between the Carpathia and the Titanic might make the timing of the last rocket sufficiently sooner to prevent it being seen.

Opinions anyone?

Cheers

Paul