Pinger

We couldn't take the boat into the shallows near the reef because our sonar pinger was broken.

The scientist attached a pinger to the carapace of the sea turtle to track its migration.

Some people like fancy pingers with extra features, but I always use the default ping application.

Every time we replace the main page, we get flooded with pingers making sure our web site is still there.

That was a great party. Everyone took a pinger or two.