The size of loop 52a is such that line 52 is free to slid along shaft portion 53a as {HEAD ~ floatation marker buoy} 51 floats upward to the top of the water and into {TAIL ~ its marking state} without allowing loop 52a to slip off of shaft portion 53a 
The size of loop 52a is such that line 52 is free to slid along shaft portion 53a as { HEAD ~ floatation marker buoy } 51 floats upward to the top of the water and into { TAIL ~ its marking state } without allowing loop 52a to slip off of shaft portion 53a
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH