DESCRIZIONE
A method of controlling propulsion of a marine vessel (10) includes receiving proximity measurements (90) from one or more proximity sensors (72,74,76,78) on the marine vessel (10) and limiting user input authority over propulsion output in a direction of an object (O) by at least one propulsion device (12a,12b) based on the proximity measurement (90) so as to maintain the marine vessel (10) at least a buffer distance (50) from the object (O). The method further includes suspending maintenance of the buffer distance (50) from the object (O) in response to a user-generated instruction. Then, when user control input is received via a user input device (22,28,29,30,32,34) to move the marine vessel (10) in the direction of the object (O), the at least one propulsion device (12a, 12b) is controlled based on the user control input such that the marine vessel (10) approaches and impacts the object (O). [Image Omitted]