I recently purchased a 1991 32s5, and am trying to figure out the systems. There are 3 breakers under the nav station seat. The 3 breakers have stickers on them that look like (1) a shower head with vapor rising (2)a colon : in a recangular box (3) a circle that contains a sidways colon with an underline.Any idea what these breakers control? The boat has a hot water heater and AC/Heat.