There has been disagreement about the nature of the green signals used by Boxhall to attract the attention of Carpathia. Some say they were hand-held flares others that they were Roman Candles. What were they? During his evidence, Captain Rostron told his questioners that he first saw the green flares at 2:40am that morning. If we assume a speed of 15 knots for Carpathia and she arrived at Boxhall at 4pm then Carpathia was within 20 miles of Boxhall when Rostron saw the flares. If Boxhall fired Roman candles then Rostron's claim is spot on. I am not certain of Rostron's height of eye but I have estimated it to be 55 feet. If so then a height of eye of 55 feet and a sighting distance of 20 miles gives a signal height above the water of 100 feet. That being the case, Boxhall was using Roman Candles. If we reverse the situation and start with Boxhall standng in the stern of rescue boat 2 holding a flare aloft then his visible horizon would be 3.25 miles. Carpathia's would be 8.5 miles giving a maximum distance of 11.75 miles between Boxhall and Carpathia. This means that Rostron did not sight Boxhall until about 03:13am not 2:40am that he claimed he did. Possibly Rostron made a mistake about the time, but I don't think so. He remarked that he thought the green flare was a White Star Line night signal and that Titanic was still afloat. If that were the case then he would be assuming that he was seeing Titanic's upper bridge. Titanic's upper bridge would be about 85 feet above sea level. If this were so then the maximum range that such a signal could be seen would be just over 19 miles... more or less the estimate made by Rostron. We know the bridge was gone by that time so Rostron must have been seeing a Roman Candle. I understand a member of the number 2 boat crew, Steward James Johnston actually mentioned the use of Roman Candles. What do you think? Jim C Jim C.