Ray70 Hailer

[Kevin]

Recently installed a Ray70 VHF with 2nd Station Mic on a power boat with flybridge.

Ray70 is at the lower helm with the 2nd Station Mic on the flybridge. The hailer horn is mounted directly on the front of the flybridge which is in front of the helm.

The Ray70 is also connected to external speakers split between lower helm (passive) and flybridge (active speaker).

Everything works correctly, however using the hailer function from the 2nd Station mic immediately causes loud feedback. The lower helm mic works correctly when keyed. The 2nd station mic is approximately 4-6 feet directly behind and above the hailer horn when being used.

Is there any remedy to correcting the feedback issue with the hailer horn when keying the 2nd station mic? I feel like it should be far enough away from the hailer to not interfere but this is the only practical location to mount the mic.