The diving supervisor shall insure that—

1. (a) SCUBA diving is not conducted—

   1. (1) Outside the no-decompression limits;
   2. (2) At depths greater than 130 fsw;
   3. (3) Against currents greater than one (1) knot unless line-tended; and
   4. (4) If a diver cannot directly ascend to the surface unless line-tended;
2. (b) The SCUBA diver has the equipment required by § 197.346(a);
3. (c) A standby diver is available while a diver is in the water;
4. (d) A diver is line-tended from the surface or accompanied by another diver in the water in continuous visual contact during the diving operation;
5. (e) When a diver is in a physically confining space, another diver is stationed at the underwater point of entry and is line-tending the diver; and
6. (f) A boat is available for diver pickup when the divers are not line-tended from the dive location.