Depth markers shall be installed at the maximum and minimum water depths and at all points of slope change. Depth markers shall be installed at water depth increments not to exceed 2 feet (607 mm). Depth markers shall be spaced at intervals not to exceed 25 feet (7620 mm).
Depth markers shall indicate the actual pool depth within ± 3 inches (76 mm), at normal operating water level when measured 3 feet (91 cm) from the pool wall or at the tangent point where the cove radius meets the floor, whichever is deeper.
Depth markers on the vertical pool wall shall be positioned to be read from the waterside. Depth markers shall be placed so as to allow as much of the numbers to be visible above the waterline as possible.
Depth markers on the deck shall be located within 18 inches (457 mm) of the water edge and positioned to be read while standing on the deck facing the water.
Depth markers shall be distributed uniformly on both sides and both ends of the pool.
Depth markers shall be not less than 4 inches (102 mm) in height. The color of the numbers shall contrast with the background on which they are applied and the color shall be of a permanent nature. The lettering shall spell out the words "feet" and "inches" or abbreviate them as "Ft." and "In." respectively. Where displayed in meters in addition to feet and inches, the word meter shall be spelled out or abbreviated as "M".
Where the pool depth is 5 feet (1524 mm) or less, the "No Diving" symbol shall be displayed. The symbol shall be placed on the deck at intervals of not more than 25 feet (7620 mm). Additional signage shall be in accordance with NEMA Z535.
Public pool Classes A, B, and C shall be provided with lifesaving equipment in accordance with Sections 409.4.1 through 409.4.4. Such lifesaving equipment shall be visually conspicuous and conveniently located at all times.
A swimming pool accessory pole not less than 12 feet (3658 mm) in length and including a body hook shall be provided.
A throwing rope attached to ring buoy or similar flotation device shall be provided. The rope shall be not less than 1/4 inch (6 mm) in diameter and shall have a length of not less than 11/2 times the maximum width of the pool or 50 feet (15 240 mm), whichever is less. A ring buoy shall have an outside diameter is not less than 15 inches (381 mm).
Pools covered in this code shall be provided with first aid equipment, including a first aid kit. First aid equipment and kits shall be located in an accessible location.