The no. and location of life buoys on your ship can always be found in the “fire control and safety plan” of the ship which is always posted on bridge & other conspicuous places.
According to SOLAS CH III, Section III, regulation 32:
The minimum carrying capacity of the lifebuoys is as per Ship’s length
- Under 100 m = 8 no’s
- 100 m to 150 m = 10 no’s
- 150 m to 200 m = 12 no’s
- Above 200 m = 14 no’s