If all you are going to be diving
is to check an anchor
or scrub a bottom, I would consider myself anal to require a dive buddy for a shallow small thing like that. However, I have had years of training and dive experience and feel confidant in regard to dive problems and self rescue
situations. Most divers experience problems in the first thirty feet or so of the water
column, however, this is not an indication in itself that the shallow depth
is at issue, as there are many other factors involved in establishing cause of those problems, such as training, fitness to dive, fatigue, illness or medical
problems, etc. Most recreational divers spend more time in that first thirty feet of water
as well, so that also in itself is a factor. Recommendations are to always dive with a buddy, however in the real world, we all make our own choices, and no one will stop you or take the consequences of your decisions but you.