Modular marking system for athletic fields

A method of marking visible game marking lines on an athletic field for a sporting event playing field comprising:

• locating critical marking points on the athletic field, the critical marking points determined by marking the intersection points of field marking lines defining the sporting event playing field;
• inserting a plurality of ground anchors into the athletic field ground essentially flush with the ground, where one of the ground anchors mark each intersection point of the field marking lines and each ground anchor contains a central socket;
• applying visible marking lines on the athletic field, where each visible marking line is applied by inserting a rotatable lining peg into one of the ground anchor sockets and aligning the lining peg with an alignment peg disposed in another ground anchor socket aligned on a straight line coinciding with one of the field marking lines, stretching a string between the lining peg and the alignment peg, and marking a visible marking line on the athletic field aligned with the stretched string;
• removing the marking pegs and alignment pegs from the ground anchors and inserting upright visible markers in at least some of the ground anchors to mark strategic points on the sporting event playing field, where said upright visible markers each contain a variable diameter depending coiled spring means inserted within one of the ground anchor sockets, where each upright visible marker is adapted to bend laterally at approximately ground level upon impact without dislodging from the ground anchor;
• and
• removing said upright visible markers from the ground anchors after completion of the sporting event.