i agree, that is the font
once the moose is on the tee, the vinyl is just an eyeball
you'll be surprised how quickly you get accurate
me personally, i would simply align the second 'o' in moose in between the two upper points of the antler
would not even need a ruler
for centering the moose, i would put it as close to final position as you see it,
measure down from collar for vertical distance
then measure from far right edge of nose to the right-side seam,
and do the same from the far left edge of back foot to the left-side seam
boom, centered moose in ~20 secs, the vinyl lettering would be done in under 5 secs
if you are worried about it being not straight,
you can measure from the bottom of the two outside feet to the bottom seam
or if you have your tee nicely centered on the bottom platen then use a large plastic triangle (drafting tool, staples/office depot/etc.),
and use the edge of the platen on one straight edge of the triangle and the other place under the feet
if the feet line-up with the edge, then it is good to go
EDIT to Add: for full front designs,
i also measure from the two points (left and right) where there shoulder seam meets the collar seam straight down to the top of the design
then if these two measurements match it is straight
another option is to print a thin black line square around the moose about 1/2" around
center it to the moose and print it off with the moose
cut the jpss off just inside the square, weed your moose
now you you have something with long defined edges, making it easier to measure/center (even visually)
i find a cheap plastic ruler woks best for the measuring, light and easy to move around with no fear of possibly tearing the fabric