No—compasses work normally in the Bermuda Triangle. The idea that they malfunction is a myth.
Compasses align with Earth’s magnetic field, generated by the planet’s molten outer core. The field varies slightly by location, causing minor deviations (magnetic declination), but never total failure.
The region (bounded by Bermuda, Puerto Rico, and Miami) has a slightly weaker magnetic field, which can reduce compass sensitivity marginally—but not enough to impair navigation. Countless vessels and aircraft have traversed it safely using standard compasses.
Modern navigation relies on GPS, gyrocompasses, and magnetic compasses—all functioning reliably in the Bermuda Triangle.