A control system for a marine vessel having three or more engines is disclosed. The coupling member includes a cross component, a latch component, and a flexible strap. The signal retrieving module receives a signal-under-test, and retrieves a first pulse signal having a pulse width equal to a period of the signal-under-test. The applicator elements in the first row may include at least one applicator element including a main portion extending substantially parallel to a face of the core underlying and facing the main portion. Each curve follows a different radius emanating from a respective axis substantially parallel to the rotational axis of the cam profile sector. The nucleic acids may be isolated from any suitable species, and in a preferable embodiment are isolated from Lactobacillus gasseri.