Why retire either of them? Well, before the G-9300 came out the Mudman had either the rally timer or dual stopwatch over the Gulfman. Otherwise, there wasn't much of a difference. The Gulfman is explicitly rust resistant and thus mud resistant. But with a completely enclosing bezel that covers the buttons and minimizes nooks where debris can collect, you'd essentially have a Mudman.
With the G-9300, the Mudman functionality was boosted with the addition of a temperature sensor, a moon phase indicator, and a compass. This certainly helped diverge the Mudman away from being too much like the Gulfman. But in reality... if the Mudman were given a tidegraph, wouldn't it effectively replace the Gulfman? Put a titanium back plate on it and I'd say YES.
- The compass is large enough that it could be utilized to display the moon phase at the press of a button (toggle between moon phase and compass). There's no need for a separate moon phase, and this will free up some real estate.
- A large dot matrix section on the top part of the display can handle the date, day, secondary stopwatch, secondary countdown timer, and tide graph (the tide graph provides information that is not frequently viewed, and therefore it does not need a dedicated display). All of this information is used sequentially, and not needed simultaneously. The compass degrees and temperature can still be displayed in the main section, putting the time display above when used.
- Power wise, can the watch handle all these functions? Yes. The tide graph consumes very little power, as it is not an active sensor--it merely does a calculation to display the data upon request.
- The bezel can be redesigned to minimize mud collection and cover the buttons to prevent silt infiltration, while still showing some titanium accents.
So as I see it, we really don't need both. Make the Mudman rust resistant in addition to mud resistant and add a tidegraph. Redesign the display to accommodate the data a little better than what it already does, and the task will be complete. Good bye, Gulfman. You've served us well but you've outlived your usefulness.