Simrad SP90

Simrad SP90SymbolThe Symbol functions provide on-screen graphic references fortargets, own ship and fishing gear.(CD5347)SYMBOLTargetmarkerOwn shipmarkerCirclemarkerGearsymbolTarget markerTo mark a target, move the cursor over it and press thebutton. A triangular symbol with a correspondingnumber will appear on the screen over the target.Position data for the definedmarkers are displayed inthe Objects menu.Notre that the system continues to track the markerseven when outside the sonar range.The Target marker function can also be used formanual target tracking as the system is designed tocalculate the speed (S), course (C) and distance (D)between the last two chosen targets.The Target marker data is displayed in white figuresfor three minutes in the lower right hand corner of thehorizontal presentation. This function is also aneffective method for determining the distance betweentwo selected points on the screen.Own ship markerThe “own ship” button produces a square symbol on the screen atthe vessel’s current location when the button is pressed. The ownship marker’s position data is displayed in the Objects menu.Circle markerThis marker may be used to estimate the size of a school of fish oras an indication of the size of the purse seine. To activate thefunction, move the cursor to the desired position and press thebutton. A circular symbol will appear on the screen at the chosenlocation. The size of the symbol is equal to that of the purse seineselected.Gear symbolThe gear symbol may be either a purse seine circle or a trawlsymbol depending on the parameter chosen by the Gear button inthe Setup menu. The selected gear symbol will be displayed inyellow.Seine circleThis is a useful aid in planning the shooting of the purse seine. Itis used as follows:24 850-164511 / B