This is what the Dutch ferry operators ask of you
www.getreadyforbrexit.eu –All ferry operators operating from the Netherlands to the United Kingdom provide on their own websites essential information for a smooth crossing on their ships. Whichever ferry operator you choose: before you start booking always check the Brexit ins & outs on the relevant website.
More information
Pre-lodgement and temporary storage: the applications by Dutch ferry operators
Each ferry operator in the Netherlands decides for itself which Border Entry model it chooses to use. Check the overview here.