furuno sound pic

 Hi Guys,

Recently upgraded to a FCV 587 with a P66 transducer. Found a spot of hillarys and wanting your thoughts on the ground. There seems to be a small rise of a 1-2 meters prior

to sounder showing whats circled in red, Is it reef/coral sturture ontop of a hard bottom?  


I had the sounder in auto/fishing mode as I am still learning to read the bottom. Anyone got any tips on settings if I switch to manual mode.


Thanks in advance for your comments.




Image Upload: 

Posts: 5744

Date Joined: 18/01/12

 It would catch my eye, but I

Mon, 2018-06-18 15:55

 It would catch my eye, but I set mine up the other way, bottom lock on right and picture on left so you have a wider outlook.

Following is how to set up, get out of auto



 Give a man a mask, and he'll show you his true face...



The older you get the more you realize that no one has a f++king clue what they're doing.

Everyone's just winging it.


Posts: 10

Date Joined: 01/02/10

 Yeah good point, I’ll switch

Mon, 2018-06-18 18:09

 Yeah good point, I’ll switch mine around also, 

thats for link on setting up in manual

scano's picture

Posts: 1246

Date Joined: 31/05/07

Did you catch those baldies off it?

Mon, 2018-06-18 16:54

if so who cares what the tv says, let the fish results do the talking. 


Good job




Posts: 10

Date Joined: 01/02/10

 Produces baldies most of the

Mon, 2018-06-18 18:08

 Produces baldies most of the time,  

im just in the process of trying to find some new ground and learning what the sounder is telling me

JohnF's picture

Posts: 2836

Date Joined: 07/07/10

 Id say they are baldies just

Mon, 2018-06-18 17:18

 Id say they are baldies just off the bottom :)


Boston Whaler 235 Conquest......getting the flogging it was built for.

Vinesh87's picture

Posts: 2751

Date Joined: 02/04/11

 Looks like what i was

Mon, 2018-06-18 17:44

 Looks like what i was catching reds on in exmouth!

Riles's picture

Posts: 119

Date Joined: 20/02/11


Mon, 2018-06-18 20:34

 I find that when mine shows decent corally lumps it normally comes up strong off the bottom, then generally weekens on the top. You seem to have a 50cm+ gap offf the bottom with little return then returns above that. I’d agree without johnF and say most likely fish.

Posts: 115

Date Joined: 05/08/16

 Manual settings I use.gain 6

Thu, 2018-06-21 15:18

 Manual settings I use.

gain 6 min

clutter erase 20%

color erase 16 %

tx power 100

tx rate MAX

turn off bottom discrimination 

turn off acce fish.

scroll speed 1/1

shift right and zoom right hand side to show 15m of water in that depth. 

Regarding confirming what the sounder is showing attack the mark from different angles, quite often bottom lock will show a gap if you don’t get the beam right over the lump. 

But from freedivingexperience you don’t need a lot of structure to catch baldies quite often super low plate coral will hold them. Trick is working out where they regularly are at.