A boat includes a dash positioned proximate a windshield at a first non-zero angle. A speaker is mounted under a top surface of the dash at a second non-zero angle. The speaker is positioned to direct sound emanating from the speaker through an opening in the dash and the windshield is configured to reflect the sound emanating from the speaker as reflected sound in an aft direction. The boat may also include an enclosure having a reflective surface positioned within a cavity formed between the deck and hull of the boat. A speaker, mounted within the enclosure, and the reflective surface are configured to reflect sound emanating from the speaker off of the reflective surface and through an opening of the enclosure.

A boat includes a dash positioned proximate a windshield at a first non-zero angle. A speaker is mounted under a top surface of the dash at a second non-zero angle. The speaker is positioned to direct sound emanating from the speaker through an opening in the dash and the windshield is configured to reflect the sound emanating from the speaker as reflected sound in an aft direction. The boat may also include an enclosure having a reflective surface positioned within a cavity formed between the deck and hull of the boat. A speaker, mounted within the enclosure, and the reflective surface are configured to reflect sound emanating from the speaker off of the reflective surface and through an opening of the enclosure.

An audio system in a marine vessel may be created or enhanced using existing parts of the marine vessel. One or more audio transducers may be secured directly to the windshield, and once connected with an audio input, the windshield acts as a transparent speaker.

An audio system in a marine vessel may be created or enhanced using existing parts of the marine vessel. One or more audio transducers may be secured directly to the windshield, and once connected with an audio input, the windshield acts as a transparent speaker.

A boat includes a dash positioned proximate a windshield at a first non-zero angle. A speaker is mounted under a top surface of the dash at a second non-zero angle. The speaker is positioned to direct sound emanating from the speaker through an opening in the dash and the windshield is configured to reflect the sound emanating from the speaker as reflected sound in an aft direction. The boat may also include an enclosure having a reflective surface positioned within a cavity formed between the deck and hull of the boat. A speaker, mounted within the enclosure, and the reflective surface are configured to reflect sound emanating from the speaker off of the reflective surface and through an opening of the enclosure.

A boat includes a dash positioned proximate a windshield at a first non-zero angle. A speaker is mounted under a top surface of the dash at a second non-zero angle. The speaker is positioned to direct sound emanating from the speaker through an opening in the dash and the windshield is configured to reflect the sound emanating from the speaker as reflected sound in an aft direction. The boat may also include an enclosure having a reflective surface positioned within a cavity formed between the deck and hull of the boat. A speaker, mounted within the enclosure, and the reflective surface are configured to reflect sound emanating from the speaker off of the reflective surface and through an opening of the enclosure.

A portable transducer mount suitable for mounting a transducer on a vessel may include a mount shaft configured for mounting on the vessel. A main shaft may be extendable through the mount shaft. The main shaft may have a shaft leg. A shaft spring may connect the shaft leg to the main shaft. A leaf spring assembly may include at least one elongated, flexible leaf spring carried by the main shaft and the shaft leg of the mount shaft and spanning the shaft spring. A transducer foot assembly may be carried by the shaft leg of the main shaft. The transducer foot assembly may include a base foot plate extending from the shaft leg of the main shaft. A transducer cable conduit may extend between the base foot plate and the shaft leg of the main shaft. A conduit bore may extend through the transducer cable conduit for passage of a transducer cable from the shaft leg through the transducer foot assembly to the transducer.

Disclosed is an underwater drop type position guiding apparatus, the apparatus including an underwater drop type body having a lower end part in a shape of a cone pointing downward. The underwater drop type body is provided with a GPS module, an underwater communication transmitter, a controller, and a battery. After being installed on the sea floor by being dropped to the water from above the surface of the water, the apparatus guides underwater coordinates to various underwater vehicles using GPS location information having received from above the surface of the water.

Disclosed is an underwater drop type position guiding apparatus, the apparatus including an underwater drop type body having a lower end part in a shape of a cone pointing downward. The underwater drop type body is provided with a GPS module, an underwater communication transmitter, a controller, and a battery. After being installed on the sea floor by being dropped to the water from above the surface of the water, the apparatus guides underwater coordinates to various underwater vehicles using GPS location information having received from above the surface of the water.

The present disclosure provides a spread spectrum landing system with a low probability of intercept altimeter that is in communication with a plurality of asymmetrically placed antennas or transponders near a landing area. The low probability of intercept altimeter acts as a secondary system in the event that a primary landing system for the mobile platform is denied or otherwise inoperable. The low probability of intercept altimeter cycles through unique pseudo noise (PN) codes to determine a line of sight relative to each antenna or transponder. A single algorithm or process determines and ranges the platform relative to the transponders to effectuate the landing of the platform.