Fogsignals are auditory signals that are used to warn ships of obstacles and navigational hazards during foggy conditions. There are various synonyms for the term fogsignal, including foghorn, horn, siren, whistle, and klaxon. Foghorns are loud and typically used to emit low-frequency sound waves, while sirens and klaxons are higher pitch and often used in emergency alert systems. Whistles are also often used in watercraft navigation to signal to other vessels. Regardless of the terminology used, fogsignals play an essential role in ensuring the safety of those who navigate through potentially dangerous navigational conditions.