46 m cwt training dive for spearfishing

Training for a 50 m dive - first i want confidence in mid 40s. In four days time I will, if condidtions permit, try spear a fish below 50 m on cwt. Todays dives prepared me mentally. Equalizing and preparations were all in order. Note the changes in the water 22 deg and clear on top, murky at 7-14m then clean and cold and a bit fuzzy below but still clean and a bit dark.