An accessory mount for goggles is disclosed which may be attached to the strap or straps of goggles worn on the face of a person. The accessory mount may include a body and a mounting structure. The body may include one or two slits through which the strap or straps of the goggles may be inserted. The body may also include a facial section contoured to fit a person's face, and the facial section may have a cushion configured to rest against the face. The mounting structure may be configured so that different types of accessories, such as a camera or flashlight, may be removably affixed to the mounting structure.

A dive mask including an ultrasonic communication system and an alert subsystem to measure the distance between two dive masks and alert divers if they have moved apart and exceeded a setpoint range. An illuminating edge or indicator light including at least one LED will illuminate to notify the divers they have moved apart and exceeded the setpoint range. The dive mask includes a danger function the divers may trigger to notify each other of potential danger. The dive mask includes a function to illuminate the at least one LED if the battery level in either dive mask is low.

The invention is for a communicating diving mask with a body including a frame (20) surrounding at least part of a user's face; a glass (10) surrounded by the frame (20), where the diving mask has an electromagnetic transducer (23) arranged in contact with the glass to vibrate it; and a microphone (22) arranged in the mask, and a control unit (25) configured to control the vibration of the electromagnetic transducer (23) on the basis of a signal transmitted by the microphone (22).

A light-emitting apparatus includes: a flexible base body; and a light-emitting component which is attached to the base body, has a form which changes flexibly following a change in the firm of the base body, and includes: a light guide which guides laser light that enters one end of the light guide; a leaking means for causing part of the laser light guided by the light guide to leak out of the light guide in a direction which crosses a light-guiding direction; and a first light-emitter which extends along the light-guiding direction and emits light based on the part of the laser light that is leaked out of the light guide by the leaking means.

Disclosed herein is a coupler to be connected to a face mask of the kind having a pair of lenses surrounded by a frame. The face mask is worn by a user (e.g., a swimmer or an underwater diver) so that an appliance (e.g., a light source or a camera) can be attached to the coupler and carried by the face mask to allow the user's hands to remain free. The coupler includes an upstanding attachment leg detachably connected to the frame of the face mask and an appliance support that is joined to the top of the attachment leg. The appliance support of the coupler is held up by the attachment leg of the coupler so as to be accessible above the frame of the face mask. The appliance is attached to the appliance support of the coupler by a removable appliance fastener that extends therethrough.

Systems, devices, and methods are provided for underwater lighting and enhanced visibility for divers using interchangeable lens filters.