Each year, a Cape Cod ham radio club commemorates the role that wireless communication played in rescuing survivors from the Titanic in 1912. The Club calls itself the Titanic/Marconi Association of Cape Cod. Their call sign is WIMGY, the last 3 letters of which were the same call sign of the Titanic. Rick Pendleton hails from Braintree, but he comes to the Cape every year to participate in the event. “We’re trying to re-create the historic transmissions that took place between the Titanic and the coastal stations,” said Pendleton. “And it’s a commemoration of Marconi’s technology that was a very important part of the rescue operation.” Pendleton taps out Morse code in a room at the National Seashore’s Salt Pond Visitor Center in Eastham. (The Seashore partners with the club to put on the annual event.) His transmitter is state of the art — a far cry from 1903, when Guglielmo Marconi built a station in nearby Wellfleet to experiment with sending radio signals over the airwaves. By 1912, passenger liners like the Titanic were outfitted with wireless setups. The emerging technology offered the only way to send and receive messages once at sea, but its limitations also contributed to the great loss of life when the ship went down.