Abstract: A surgical system having an arm or elongate portion, the arm or elongate portion being bendable, articulated, reconfigurable and/or flexible such that the arm or elongate portion is steerable by bending, articulating, reconfiguring and/or flexing of the arm. The arm or elongate portion includes or is configured to receive at least one tool or load. The system includes one or more first and/or second location or position tracking systems that are configured to determine and/or track a location and/or position of one or more parts or a whole of the arm or elongate portion and/or the tool or load. The at least one first location or position tracking system is a non-optical or non-radiation based location or positioning tracking system. The second location or position tracking system is an optical or radiation based positioning system.