Actually, moving the center of gravity up matters a great deal in a cat - it increases the risk of capsize
. It is also not merely the weight of the stove, but of counters, the refrigeration
unit/s and contents, the dishes, pots and pans, cutlery and stores. It is the heaviest part of the accomdation in the boat and hence, is better lower rather than higher.
In addition, a galley down has the following advantages:
1. it tends, especially in boats under 40 feet, to provide for more counter and storage
2. it provides a secure space for wedging in the cook while underway (and yes, even cats move around a good deal in a seaway).
3. it can provide equal ventilation (mine has overhead vents, an overhead hatch
and an opening portlight as well as fixed windows) while keeping some of the heat out of the main saloon.
4. it keeps the 'mess' of meal preparation out of the main saloon.
5. it adds additional space to the main saloon for lounging (particularly important in cats of about 40 feet or less, as has already been pointed out).
6. it permits space in the bridgedeck accomodation, where it belongs, for a full-size, sit-down navigation
If designed properly, the galley down can remain open to the main saloon (mine is except in the area of the freezer/microwave oven): the area with the sinks, stove/oven. glass storage, front-load refrigerator
and the principle counter space is all open with a pass-through shelf to the main saloon. This enables the cook to remain part of the activity/conversation in the main saloon.
The only negative, in my opinion, is that there is no pass-through to the cockpit area. I believe that Talbot has it right - once over about 46 feet, you have enough space in the bridgedeck accomodation to do pretty much whatever you want. Below that (and especially below 40 feet), situating the galley in the bridgedeck tends to compromise a great deal of space that can be better used for lounging and navigation
. Furthermore, for purposes other than the charter
industry, it makes better use of the narrow space in one of the hulls than adding another couple of small head
compartments, or a narrow lounge with a settee facing a wall in a tunnel-like owner's stateroom.