It appears that your data will have fields named LAT and LON. Try this:
sourcetype=shipdata moresearchstuff
| eval _geo = tostring(LAT) + "," + tostring(LON)
This will create the _geo field that the app expects.
To get the data into Splunk, you have many choices. You could set up a feed as they describe in the web page. Or you could use the data export function to retrieve the data into a file. Once you have the data in a file, you could upload it into Splunk using the Manager and Data Inputs. It will be easiest if you have already created a sourcetype for your data. You could put the following lines in $SPLUNK_HOME/etc/system/local/props.conf
[shipdata]
BREAK_ONLY_BEFORE=\<row
TIME_PREFIX=TIMESTAMP\=\"
MAX_TIMESTAMP_LOOKAHEAD=30
TIME_FORMAT=%Y-%m-%dT%H:%M:%S
The fields will be extracted for you automatically. If you need more help than this, may I suggest the Getting Data In manual...
