For non-drowning needs, just remember that rescue breathes are not needed unless the victim is a baby or toddler, and for the latter just take your chances.
I would like to expand on this to say that it is better to give compressions alone than nothing at all.
Caregivers need to protect themselves and that is a large part of the reason resent text is advising not to give breaths for those who do not have the extra equipment. This is partly assuming that ems will show up within minutes and take over (yes we still do ventilations when we get there). However if you have the equipment and training to use it, ventilations are very much so necessary for sustaining life. A prolonged duration of CPR prior to ems arrival such as that of someone on a boat would have zero chance of survival without gas exchange in the lungs.