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Vic Smith wrote in
: Since I'm never in a hurry (looming weather could change that) and will be driving a shallow-draft boat, you seem to be giving me driving options I never thought I had. I like it. Looming weather is probably too late. We all get caught by weather, miles from the trailer. In a river, you can speed up, but in open water that looming weather will whip the surface so you have to slow down, not speed up. Don't wait, head in early. I know that water/bottom conditions where you boat might be different than the Charlotte harbor area, but can you give this newbie a couple quick personal examples of how you put this to use? I assume you mean the sonar. Charlotte Harbor is like the rest of them, slowly, but inevitably, silting in from the tide currents. The bottom of any harbor is constantly shifting. That's what all the dredging is about where commercial shipping must have depth. Where they go, the depth is kept to 50', like Charleston Harbor's shipping channels. However, anywhere else is now completely neglected. The ICW in 90% of the nation is closing itself down because dredging stopped when shipping on it stopped years ago. Parts of the ICW are so shallow we can't drag a 6' draft sailboat keel over it any more. Florida's ICW is just awful. I can't wait to get the ketch offshore, where she belongs. The manatees have become a fantastic excuse to stop spending money on dredging so it can be diverted into something more vote productive. So, the bottom keeps coming closer and closer. In your small boat, you only need a couple of ft deeper than your motor skeg sticks down, probably 3-4' would be fine. In a small boat, I recommend a "fish finder", a sonar that makes a graphical recording of the bottom as you go over it. Even if you don't fish, it lets you see the TREND of what the bottom is doing, getting deeper or shallower in that gradual slope, reaching out to snatch the bottom of the motor away from you. The graphing sonar lets you look down to see how deep it is. When you're buying a sonar, don't worry that it will see the bottom in 600' of water. Worry that it can see the bottom in 3' of water! If it sees the bottom 50' down, that's about as far as we need. The big, deep sonars have powerful transmitters with LONG pulse widths. The shallowest bottom it can see depends on a SHORT pulse width. If the reflected sound off the bottom arrives back at the transducer while it's still transmitting, you won't see it. It has already passed by the time the long pulse width is over. A short pulse width will be over BEFORE the echo from the bottom 3' down arrives so the receiver can hear it and show you it's 3' deep. Also, get a sonar where you can put in the boat's depth to offset the displayed depth. Set the offset 2' deeper than the bottom of the engine skeg. If it ever gets close to zero, you're in trouble. The display will now show the depth of the water at the bottom of the motor skeg. NEVER let it get near zero. Just as soon as it gets to 2' of water under that expensive foot, there'll be a log sticking up to catch it. It's an unwritten law of the sea!...(c; Other obstructions it can't help you with, like those damned crab traps with the toilet floats bobbing at the surface....right in the channel ****es me off. "Red Right Returning" is the saying for the bouys coming into the harbor. Coming from sea, the red bouys should be on your right. On the ICW, it changes to confuse everyone. You'll get the hang of it. Go by West Marine and get a little plastic dash sticker they have showing how the bouys are marked. Make everyone read it who drives it. You'll be fine. My friend Dan bought a 40-something sport fisherman yacht with twin diesel monsters in Hilton Head, SC. He and his wife had never driven a boat in their lives, before. After showing them how to start it and operate the controls, the broker bade them farewell and helped them by shoving it away from the dock. Up the ICW from Hilton Head to Charleston, they only ran it aground 4 times before getting the hang of it. He'd never driven a rowboat, before...(c; A blind man with $500K to spend can buy a big diesel yacht and drive it away without breaking any laws. Blame the industry who are terrified of licensing to make it safer. Boats are bought on IMPULSE. If they have to go get a captain's license before driving it, they probably won't buy it in the first place. Hence, the lobbying to prevent licensing.... I've been boating since I got my first boat for Christmas when I was 8. Amazingly, I'm still alive to enjoy them....(c; Larry -- Halloween candy sure has dropped in price, lately! |
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