Combat Clock 1a is a 12-hour analog clock that serves as a contemporary replica of a WWI/WWII ship's clock used by the US Navy, Coast Guard, and other government organizations. This iPhone application leverages location data to display the current GPS coordinates, heading, and compass bearing, indicating the direction the top of the device is pointing to. The clock operates in portrait mode, with 12 representing North, 6 representing South, 3 representing East, and 9 representing West.

In addition to its clock functionality, Combat Clock 1a includes an alarm that rings every half hour, based on the old deck watch shift standard of 4 hours. The alarm can be set to ring from 1 to 8 bells. The application is active only when it is in the foreground, ensuring that no location or personal data is saved or sent from the device. Furthermore, users can rest assured that there are no in-application advertisements or purchases.

Whether you're a history enthusiast or simply appreciate the aesthetic of a classic ship's clock, Combat Clock 1a offers a unique and functional experience on your iPhone.