To go to a specific latitude and longitude, enter :
New MapBrowser - enter the coordinates in decimal format as follows: 34.008460, -118.498267
MapBrowser Classic - enter the coordinates in decimal format preceded by the @ symbol, as follows:
Note that Northern Hemisphere coordinates are positive and Southern Hemisphere coordinates are negative. Likewise, Eastern Hemisphere coordinates are positive and Western Hemisphere coordinates are negative.
Online converters from degrees/minutes/seconds to decimal format are available, for example: http://data.aad.gov.au/aadc/calc/dms_decimal.cfm.
While In MapBrowser Classic you can search for coordinates without the @ symbol, but the search will attempt to find the closest known address to that location, rather than going to the exact coordinates.