The highway, speedometer and odometer graphics are also giveaways. It's pretty logical. And, oh, by the way, the GPS 315 user manual is one of the best I've seen. No matter what page you're on, the menu always contains items for Waypoints, Routes, and Setup. You can create user-defined waypoints by specifying coordinates or a radial and distance from another waypoint.
Routes invokes a rudimentary capability for defining and storing multi-leg routes.
The box can store up to 20 routes of 30 legs each. Route fixes may be waypoints of any category. Routes may be edited by appending, inserting or deleting legs or changing waypoints. However, there's no easy way to skip one or more route waypoints, or to start navigating a stored route at some intermediate waypoint. It also permits you to customize the backlight timer, the beeper, and the serial output format and baud rate, and to put the unit in simulator mode.