Member B.A.S.S. Fireball. See bottom coverage and upper water column coverage and cone angles. This type of chart will occur when drifting slowly or evenThe colors depicted on a Lowrance Color unit are related to the strength of the sonarThe same chart is pictured here at the same resolution, same sensitivity, and otherIn color mode, the features of the display become more refined, as differencesIn bottom tracking color mode we change the color of bottom and structure on It's just an easy way to rember how big the spot your looking at is. I have a Garmin 250c & have misplaced the manual ( a nice way to say I have OLDTIMERS) & my remember don't always work either. Lowrance: Pro's Corner by Luke Morris On December 05, 2013 Pro’s Corner Deciphering Sonar Charts. When a sound wave passes from warmer to colder water some power is reflected as an echo. Member B.A.S.S.

The x-ducer on the trolling motor is a 14 degree cone angle at 200 khz. At the point in which the actual bottom is closest, is determined to be the actual depth under the transducer and this contour is only charted when directly below the transducer. This results in the display of thermocline echo which is in general aflat line at a consistent depth. These include but are not limited to mud, sand, silt, and water outlets from dams, locks, creeks and rivers. From the stickie at the top of the Lowrance page, under networking. Ok I leave the calculator at home when I go fishing. Participant. A fish a day keeps postal away. I am trying to remember how to figure how much of the bottom is covered by my depth finder At that depth you would get a 10 foot radius search limit out from the center of the cone. That's a 20 foot diameter circle ideally, only if the centerline of the cone is pointed perfectly vertically. I guess I need to find a 2d sonar coverage chart now too. See fishing is relaxing. ... Lowrance 111 Lake Chip ; How to keep deer from defecating in backyard. Salinity of the water even comes into play, but for us the easiest rule of thumb is 1/3 of the depth. The coverage is always a little less than the bottom depth (2/3 of depth). A sound wave is unlike a light wave or radio wave. A sonar beam with a large cone angle will provide greater coverage as it moves through the water, but it will also be more susceptible to being scattered in an unproductive way by small objects in the water. Redwood County/Scott County.

Illinois B.A.S.S. Bottom line has 18 degree cone coverages are 2' diamater in 5 feet of water. Transducer Cone Angle Chart. Like a rock dropped in a pond the waves goesoutward until it strikes and object and returns an “echo” or travels far enough to be disbursed. Each of these situations can result in the water at different levels and for different reasons oftemperature or composition, in the layering effect of water and the resultant layering ofecho returns displayed on the sonar chart. 5' diamater in 15' 9' in 25' See fishing is relaxing. Water which is colder has more closely packed molecules. ... (Lowrance Side and Down Scan cone angle.jpg) Attachments-----Lowrance Side and Down Scan cone angle.jpg (136KB - 293 downloads) tcbetka: Posted 4/18/2012 3:43 PM (#554077 - in reply to #554076) I will second that. (as I have been told)Lowrance says that with a 20* cone in 15 feet of water you will have a circle of about 6 feet. A fish a day keeps postal away. Anyone know the angle that the Lowrance side-scan beam is directed? Here it is more readily seen how what is forward rises to the transducer and what is behind falls away. Probably already bellied up to the buffet table and are taking a A sonar beam’s cone angle describes the extent to which a transmitted beam “spreads out” as it travels through the water column. Illinois B.A.S.S. So even though structure or suspended targets may return echoes long before directly below the transducer, structure and bottom do not chart until the closest point to the transducer. Knowledge of these separate layers of water,the causes of them, and how bait and game fish relate to these layers can be of greatbenefit to the game fisherman. Lowrance has manufactured innovative marine electronics for over 50 years including Fishfinders, Chartplotters, Radar and Sonar. Airmar calculator to help determine bottom coverage under your boat. I set up a worksheet in MS-Excel that lists the cone diameter in 2' increments of depth from 2-40'.

Illinois B.A.S.S. My Lowrance has a 20 degree cone angle. A fish a day keeps postal away.

I put both manuals in a safe place where I would not lose them, go figure. The transducer is an unblinking eye whichIf a Sonar actually displayed every bit of every signal it transmitted and received it may appear like the following Illustration. Oxyclines or oxygenated layers of water will produce the same results as will other various stratification of water layers. Find more fish easily. While you may begin to pick up the slightest echo returnsfrom suspended targets which are farther away than the bottom, they do not chart on the screen until they are closer than the bottom as no details are plotted below the bottom contour line. Lowrance is a leading manufacturer of innovative marine electronics including Fishfinders, Chartplotters, Radar and Sonar. Federation NationWe use the 20 degree cone when fishin salt down here, we rarely go past 150 feet in the Gulf. iceager01. Federation Nation    Yep your wright the 8* cone is best for salt water and deep sea fishing. Federation NationThank You.