@wandeljw,
I don't know - this was reported by more than just the Globe. It has been on local news stations as well. What the captain did do to compromise was to face the cannons so to be in the opposite facing direction of the neighbors who have complained.
Here is a quote from one of the neighbors: The unidentified neighbor wrote to Commander Timothy Cooper:
"Over the summer, we have entertained several times, and we have had guests sit up in shock when the cannon goes off. It has also awakened them at 8 a.m. while they are vacationing and then blasted them at sunset, a time that catches even us (8-year condo owners) off-guard since it occurs at a different time even evening."
http://wbztv.com/local/uss.constitution.cannons.2.1298785.html
Doesn't sound like they were only suggesting Sunday morning.
For arguments sake, even if it was just for Sunday, this has been going on for quite some time. And they should not have purchased a home nearby if they felt this would be bothersome. It isn't something new or surprising.