Martha was build by Børge Fischer Jensen in 1975 as a service vessel to mark the tidal channels. The cockpit was extra long to allow sufficient space for the seamarks. However, Martha was never used for this purpose, but was sold to Børges brother Hugo's daugher and son-in-law Asta and Willy Morgenstern. They used Martha as a pleasure boat until 1995 when the sanding of Sønderho Harbour made it impossible to moor the boat in the tidal channel.
1975 Børge Fischer Jensen
1976 Willy Morgenstern
2008 Bjarne Kiholm
2012 Foreningen Skøgum
2019 Foreningen Martha af Sønderho