code: public static boolean isExactEarthTimestamp(String line) {
  		try {
  			new NmeaMessageExactEarthTimestamp(line);
  			return true;
  		} catch (AisParseException e) {
  			return false;
  		} catch (NmeaMessageParseException e) {
  			return false;
  		}
  	}
docs: Returns true if the given line is a custom ExactEarth timestamp.
  
  @param line
  @return