Both the previous comments are correct! At low or minus tide, you won’t have enough water to launch? Depending on your draft, if you have enough water to launch, you can get out? In tidal waters, the CHS uses the level of Lower Low Water, Large Tide or Lowest Normal Tide as its reference plane for chart datum. The chart will show that sandbar at about one foot at lowest normal tide. They dredged that channel last year, so I don’t know what the actual depth is now… but there was/is a sandbar in the middle of the channel about 100 feet before the seaplane float, hence the comment ‘watch for the airplanes at the dock’. I usually favor their wing tips! LOL
Muchalat Inlet becomes a wind tunnel in, and with the afternoon winds, it can and will get rather choppy. I usually plan early mornings or later than 5:00 pm after the winds die down! Once out of Muchalat it is usually fairly flat.