Thank the Boro of Belmar.

http://belmar.com/content.php?npid=70&npid1=125&pid=125&menu_id=23

§ 13:82-3.17 Diving and swimming

(a) General provisions with respect to diving and swimming are as follows:

1. Underwater diving with or without an underwater apparatus is permitted in all navigable waters in New Jersey unless otherwise prohibited in this section.

2. Any person while diving shall mark his or her position with a buoyed flag:

i. Such flag shall be displayed so that it is visible all around the horizon from a buoy, float, boat or other floating object;

ii. Such flag shall be a minimum of 14 inches by 16 inches, shall be rigid to enhance visibility and shall be a red background with a white diagonal stripe running from one corner to the other.

3. No person shall operate a vessel within 50 feet of the buoyed flag.

4. No person shall display a flag at times other than when diving is in progress.

5. No person shall swim or dive in a narrow, confined or improved channel or in a marked fairway, under a bridge, or impede, obstruct or interfere with passage of watercraft therein.

6. No diver shall surface more than 25 feet from the buoyed flag except in an emergency.