In animal communication, an alarm signal is an antipredator adaptation in the form of signals emitted by social animals in response to danger. Many primates...

operator on the ship in distress transmitting the radiotelegraph alarm signal (auto-alarm) signal—twelve extra-long dashes, each lasting four seconds with a...

An alarm clock or alarm is a clock that is designed to alert an individual or group of people at a specified time. The primary function of these clocks...

moving towards or away from the detector. Such an event initiates an alarm signal. This technology is not active in many properties as many consider this...

An alarm device is a mechanism that gives an audible, visual, combination, or other kind of alarm signal to alert someone to a problem or condition that...

Alarm indication signal (AIS) (also called “all ones” because of the data and framing pattern) is a signal transmitted by an intermediate element of a...

whistle (some lines don't sound the signal on the horn or whistle) and by the ship's internal alarm (such as fire alarm bells accompanied with flashing strobe...

which includes the general alarm signal. The LSA defines the characteristics of the general alarm signal. The alarm signal itself is seven or more short...

third alarm fire, etc. Examples of such alarm levels are the signal 10-75 assignment, the signals 10-76 and 10-77 assignments, and the signal 10-60 assignment...

the sirenenprobe signal, a 15-second continuous tone. Every year on the first Saturday of October, the whole range of alarm signals (with the exception...