Other techniques that are less used in general navigation have been developed for special situations. One, known as the "contour method," involves marking a transparent plastic template on the radar screen and moving it to the chart to fix a position.National Imagery and Mapping Agency, 2001:164. Another special technique, known as the Franklin Continuous Radar Plot Technique, involves drawing the path a radar object should follow on the radar display if the ship stays on its planned course.National Imagery and Mapping Agency, 2001:182. During the transit, the navigator can check that the ship is on track by checking that the pip lies on the drawn line.
Other techniques that are less used in general navigation have been developed for special situations One known as the "contour method" involves marking a transparent plastic template on the radar screen and moving it to the chart to fix a positionNational Imagery and Mapping Agency 2001164 Another special technique known as the Franklin Continuous Radar Plot Technique involves drawing the path a radar object should follow on the radar display if the ship stays on its planned courseNational Imagery and Mapping Agency 2001182 During the transit the navigator can check that the ship is on track by checking that the pip lies on the drawn line