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hi youtubers jeff cote here  with another session on ask pys  so we've got a question here from a  fellow boater um  he asked i just purchased a new char  plotter and have to install a new  transducer  should i go with a through-haul or an  in-hole  okay so you've got a char plotter it's  not mentioned in the question but  char plotters can now come with built-in  sounders so a sounder is a way where you  can actually connect the transducer  directly  in the back of the device and it's  actually going to show you a bottom  profile like a fish finder  so transducers come in really let's call  them three different flavors  through-haul in-hall and transom mount  let's start with the worse an inhale  transducer is okay at best  right it's like having a conversation  through a wall with someone on the other  side you can maybe sort of hear someone  through a wall and through a door  and you can maybe make out what they're  saying but sending all that energy  through the hull of your boat and then  in the hopes that it's going to get to  the bottom  there's going to be a lot of what's  called signal attenuation  through the hall some of us like my boat  very thin hull  maybe half an inch some boats have an  inch or more of fiberglass so if you're  going to do an  in-hall transducer right so not  through-haul but an inhale so you glued  on the inside  you can lose a lot of signal sending  that  sound through the hall and then trying  to get to the bottom and back  so generally when we install these  in-hall transducers we do it temporarily  we do it as a backup we do it for  redundancy  but i always tell people you got to set  your expectations and they better be  pretty low  whatever you're doing with that  transducer is going to be nothing  compared to a transducer that is  a transom mount which is directly in the  water or a through-hall transducer which  is also effectively directly in the  water  so given a choice and i know it's way  more money and you've got to put a hole  in your boat and you've got to haul  out it's always always better to go with  a through-hull transducer or transom  mount transducer than an in-house  transducer  so the other thing too is now you've got  transom or  in in-hole depends on your boat right so  some  smaller boats are going to have without  boards it depends  some of them are going to have transit  mount transducers  boats are not going to have trans amount  transducers and of course there's going  to be someone out there that's going to  tell me i have one  every rule has an exception but  generally for the most of us for sale  boaters it's going to be either an  in-hall transducer or through-haul  transducer  and for a lot of boats below 30 feet uh  it's common especially without boards to  have actually a transom mount transducer  the other question that was part of that  question too is well what do i do if i  want to have two transducers  so on that note and shortly because  that's a whole topic unto itself  if you're gonna have two transducers  running at the same time concurrently  you're gonna wanna make sure that  they're actually operating at different  frequencies  if they're not you're gonna have  interference and as you go into  deeper water it's very possible that  you're going to start having  interference  and you're going to start losing your  depth and the way to troubleshoot that  is to turn one of them off and see if  the death com  the depth sounder comes back on the  other one and if it does then you know  that you've got interference so  if you're having multiple transducers on  your boat running  at the same time you need to make sure  that they're different frequencies  maybe one of them is chirp and the other  one is 50-100  so transducers is one of those things  that it sounds simple but  there's a lot of devils into the details  all right  thank you for watching this pys video if  you've got further questions  ask them down below or go on our website  to fill one of the forms don't forget to subscribe  and thanks for watching  English (auto-generated)  Videolytics