Camille Rose has worn many civic hats over decades of elected and appointed public service. In a move that caught many residents of the tight-knit town of Aquinnah by surprise, she shed the hat she has worn the longest.

Ms. Rose resigned from the planning board. She was first elected to the board in 1973. “I was chairman of the first planning board,” she told The Times. She said she had taken a few years off here and there but pretty much served continuously, often as chairman, the position she held until last week.

Ms. Rose said she did not want to elaborate on what led her to resign. “I think it was just time,” she said.

She said she was proud of the board’s accomplishments, most notably the creation of a wind turbine bylaw and the vote last Tuesday to grant a special permit to the company chosen to build a distributed antenna system (DAS).

Ms. Rose was the driving force behind the effort to pave the way for a DAS system, seen as a legal bulwark should a company apply for a permit to build a conventional tower in Aquinnah. It was not easy, and the frustration likely took a toll, said some familiar with town affairs.

Sarah Thulin, a member of the plan review committee, said Ms. Rose has been in the thick of many contentious issues and that can take a toll. “She has taken on so much for the town,” Ms. Thulin said.

The selectmen will appoint a replacement to fill the seat on the planning board until the next election.

As for Ms. Rose, she still wears many hats. She is an elected member of the board of selectman and an appointed member of the Martha’s Vineyard Commission.