Most passenger traffic to and from North and North-East Greenland today goes by air .There are two actual gateways , both near the National Park . One is the airport at Constable Point , situated at Jameson Land , municipality of Ittoqqortoormiit and the other is Pituffik ( Thule Air Base) in the North Western part of Greenland . There are regular air services to both airports , but from this point the traveller must charter his own air craft or – if the starting point is Constable Point in the summertime – a boat from the Tourist Office in Ittoqqortoormiit . With a written permission from the Greenlandic and the Danish authorities it might be possible to use the sea ice , a few natural gravel strips and the airstrips of Mestersvig , Zackenberg and Daneborg for landing sites at certain seasons of the year . The National Park is administered by the Home Rule Authorities of Greenland , who deals with the applications for the coming summer season . Those who wants to visit the National Park must write for a special application form from the Danish Polar Center . The National Park is under Greenlandic jurisdiction and this is being maintained by the Sirius Sledge Patrol.