n February 13, 1913, the Salem sailed from the League Island Navy Yard at the mouth of the Delaware River for the Mediterranean Sea so that the official tests of the Arlington station could be made. The letter D was used for the test signals and we sent these out from Arlington for 15 minutes each time before the messages were transmitted.
Officials from the Navy Department gave us the messages to send and we were allowed under the terms of the contract to repeat each message three times to make sure the Salem got it, but no more. The Salem then followed by sending the test signal D and after this she sent four messages which the Captain gave her operators. This exchange of signals and messages was made twice a day throughout the Salem’s voyage across.
The messages we sent from Arlington were received by the Salem up to a distance of 2,375 miles, while the messages sent by the operators on the Salem were received by Arlington up to a distance of 1,000 miles. Far greater distances were covered by both the shore and ship stations but they were not accurate enough to
