I don't know if you can see the attachment but it's a letter and a response I sent to PS concerning streaming a VHF transmission directly into hearing aids. This is a fairly big deal to the hearing impaired because propriety hearing aids increase sound in select certain frequencies that need boosting. So its not just "turn up the volume" which can be easily done with a command mike or aux speaker as increase in volume just increase distortion. Essentially, the response was a couple of work arounds but I am gratified that PS thought my inquiry interesting and more importantly Raymarine has sent the idea to its product manager and liked the idea. Kudos to Practical Sailor and to Raymarine.