Museum Directory


847 Orleans Rd
Chatham, MA 02650
Phone: (508) 945-8889

The mission of the Chatham Marconi Maritime Center (CMMC) is to engage, educate and inspire visitors of all ages and interests with the rich history of wireless communication on Cape Cod and the limitless future potential of science and technology to transform our lives.

Did you know?

This is the site of the Navy’s top-secret “Station C” during World War II where it had the vital role of intercepting German U-Boats’ coded signals.

The Chatham Marconi Maritime Center (CMMC welcomes visitors of all ages to learn, interact and value the rich history of wireless communications on Cape Cod. You are invited to join us at CMMC for a better understanding of how communications science and technology have changed our lives.

In 1914, Guglielmo Marconi built a high powered wireless station in Massachusetts. The receivers were here in Chatham and the transmitters were forty miles west, in Marion. The station was paired with a station in Norway to provide wireless communication between the two continents, using Morse code. That plan was interrupted by World War I. After the war, the station was bought by RCA and, except during World War II, stayed in operation as a wireless maritime station for over seventy years until 1997.

This museum tells the story of Marconi, whose company built the station, and how the station's Morse code operators were able to communicate with ships across the world even a hundred years ago. And it tells the story of the secret role that the station played during WWII. You will also have a chance to practice Morse code and find out which is faster, Morse code or texting !

As you tour CMMC you will discover its "Untold Story".


REGULAR SUMMER SEASON: Tuesday June 21 through Sunday October 9

Tuesday through Saturday 10:30 AM until 4:30 PM. (Closed Friday June 24 for a special event)

Sundays 1:00 until 4:00 PM

Closed on most Mondays. (Special Monday opening dates July 18 and 25, 10:30 AM until 4:30 PM)

2016 Admission
Adult, Senior, Student $7.50 - valid for day of purchase and for a second visit within seven days.
Children 10 and under Free
Groups Contact us for Group information at or by phone at +1 508-945-8889

Plan to spend at least an hour at CMMC. When you first arrive, watch our introductory video: "Chatham Radio: WCC The Untold Story", narrated by Walter Cronkite. We have additional short videos that will enhance your visit -- each is about 10 minutes long (see our Exhibits page for their description).

Most of our exhibits have "touch screen" panels and audio to provide background information. You can send a message in Morse code at the interactive kiosk. Children will enjoy the scavenger hunt to identify items across the exhibit space.

Spend some time in the Museum Shop, browsing the wide selection of books, logo clothing and other it

Monday Closed
Tuesday Closed
Wednesday 01:00 PM - 04:00 PM
Thursday 01:02 PM - 04:00 PM
Friday 01:00 PM - 04:00 PM
Saturday 01:00 PM - 04:00 PM
Sunday 01:00 PM - 04:00 PM
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