Where large numbers of records are being updated it is likely to be more efficient to do this offline than to edit each record using the online process.
Offline editing is completed using a spreadsheet downloaded from the MHR RemData site. To request this spreadsheet click on the "Download position data for update" link on the main Data Submission screen, and complete the form shown here:
Select survey
Select the Survey for which records are required.
Generally this would be the survey for which data is currently being collected for update and analysis. You can however use this process to download data from a previous survey to which you have contributed.
You cannot edit or upload data for a previous survey however as all records are locked.