Forerunner ® 205/305 Owner’s ManualSettInGSData RecordingData recording controls how theForerunner records detailed datafor your runs or other activities.By default, the Forerunner usesSmart Recording to record yourmovements and create detailedhistory. Smart Recording picksup key points where you changedirection, speed, or heart rate.You can also record data everysecond. Doing so creates themost accurate record possible ofyour activity. However, with thissetting, the Forerunner can onlyrecord up to 3.5 hours of detaileddata.Note: When the hstory s full,older hstory data s overwrttenautomatcally. Be sure to transferhstory to Garmn Tranng Centeroften.To change data recording:1. From the Main Menu, selectSettings > General > DataRecording.2. In the Record Data Pointsfield, select Every Second orSmart Recording.Adding AccessoriesThe Forerunner 305 has twopossible accessories: a heart ratemonitor and an optional Garmincadence sensor. You can enablethese accessories from this menuor restart scanning if you arehaving trouble receiving data.To scan for accessories:1. From the Main Menu, selectSettings > General >Accessories.