I am wondering how much draft a catamaran has to need to see depth from up the mast in a crows nest

We have steps to first spreader however the nav equip is all linked to a Raymarine E120 Plotter i'm putting a small wide angle camera direction map for travel (same as engine-room camera etc) at the second set spreaders to give a birdseye view for poking around coral with low light. Not expensive and handy as! Cheers Frank
Doesn't anyone have any concerns about the added weight and windage aloft, to say nothing direction map for travel of the increased chafe on headsails? On my last boat I had folding aluminum mast steps and while they greatly facilitated going aloft for navigation and the inspection/repair of halyards, masthead lights etc., they also increased direction map for travel the tendancy of the boat to heel, caught the occasional halyard and added noise in strong winds. For the purpose of navigating around coral, it strikes me that the wide-angle video camera is a far more sensible idea.
I've got a Garmin radar array on the front side of my mast and it has been a full on pain in the a..s with respect to headsail chafe. direction map for travel It's on my to do list to move it to a radar pole on the stern...albeit low on the list. I can't believe that a crow's nest arrangement wouldn't be worse.
I am wondering how much draft a catamaran has to need to see depth from up the mast in a crows nest like a full keel monohull . I would be more comfortable with a hand held autopilot and set on one of our bow seats to steer with our 18 inches of draft . We have been thinking of adding mast steps but we don't know about the wind noise .
Doesn't anyone have any concerns about the added weight and windage aloft, to say nothing of the increased chafe on headsails? On my last boat I had folding aluminum mast steps and while they greatly facilitated going aloft for navigation and the inspection/repair of halyards, masthead lights etc., they also increased the tendancy of the boat to heel, caught the occasional direction map for travel halyard and added noise in strong winds. For the purpose of navigating around coral, it strikes me that the wide-angle video camera is a far more sensible idea.
I am wondering how much draft a catamaran has to need to see depth from up the mast in a crows nest like a full keel monohull . I would be more comfortable with a hand held autopilot and set on one of our bow seats to steer with our 18 inches of draft. We have been thinking of adding mast steps but we don't know about the wind noise.