Table Four 1. Ships other than aircraft carrier types (CV, CVN, LHA, LHD, and LPH) may not simultaneously exhibit the masthead lights required by Rule 27(b)(iii) and the lights required by Rule 27(b)(1) for vessels restricted in their ability to maneuver when such simultaneous exhibition will present a hazard to their own safe operations. In those instances, the lights required by Rule 27(b)(1) will be exhibited. Ships conducting flight operations also may not exhibit the stern light required by Rule 27(b)(111). 2. To provide all-round visibility, the lights required by Rules 27 (a) and (b) will consist of two lights, one light port and one light starboard on the mast or superstructure at each location in the vertical array. 3. The second masthead light required by Rule 23(a)(ii) and the lights and shapes required by Rules 24, 27, and 30(d)(i) are not displayed by submarines. 4. On mine warfare type ships the masthead lights will not always be above and clear of the minesweeping lights, as is required by Annex I, Section 2(f). The positions of the masthead lights with relation to the minesweeping lights are as follows: 5. The masthead light required by Rule 23(a)(1) is not located in the forepart of the vessel on the CSP Class and SLWT Class. 6. The arc of visibility of the after masthead light required by Rule 23(a)(ii) and Annex I, section 2(f) may be obstructed from right ahead on certain naval ships as follows: USS KANSAS CITY (AOR 3) USS SAVANNAH (AOR 4) USS WABASH (AOR 5) USS KALAMAZOO (AOR 6) USS HUNLEY (AS 31) 1° 13' 7. On the following ships the arc of visibility of the forward masthead light required by Rule 23(a)(1) may be obstructed through 1.6° arc of visibility at the points 021° and 339° rel 8. Sidelights on the following ships do not comply with Annex 1, Section 3(b): 9. On LCAC-class amphibious vessels, full compliance with Rules 21(a), 21(b), and 22(b), and Annex I, section 2(a)(i), 72 COLREGS, cannot be obtained. Tables One and Two of section 706.2 provide the dimensions of closest possible compliance of LCAC-class amphibious vessels with the aforementioned rules. The following paragraph details the specific dimensions of closest possible compliance and the basis for certification by the Secretary of the Navy that full compliance with the aforementioned rules is not obtainable. In LCAC-class amphibious vessels, there are permanent and temporary masts. The permanent masthead light is located 5.26 meters athwartship to port of centerline 5.49 meters above the hull. The temporary masthead light is located 3.98 meters athwartship to starboard of centerline 4.06 meters above the hull. The temporary masthead light is displayed in lieu of the permanent masthead light only when LCAC-class amphibious vessels are operating with amphibious assault vessels. When operating in this mode, the sidelights are displayed at a height greater than three-quarters of the height of the temporary masthead light. The sidelights are located on top of the port and starboard deckhouses to permit the required unobstructed arcs of visibility and are 3.28 meters above the hull, resulting in a vertical separation between those lights and the temporary masthead light of 0.78 meters. Because of the minimal vertical separation between the sidelights and the temporary masthead light and the luminous intensity of the temporary light, the sidelights on these vessels may not be distinguishable by the naked eye at the 2-mile range required by Rule 22(b). 10. On the following ships the arc of visibility of the after masthead light required by Rule 23(a)(ii) may be obstructed through 0°48.6′ arc of visibility at the point 349° relative to the ship's head: USS KIDD (DDG 993) USS CALLAGHAN (DDG 994) USS SCOTT (DDG 995) USS CHANDLER (DDG 996) 11. On USS DOLPHIN (AGSS 555) the masthead light will be visible at a distance of 4.3 nautical miles and the sidelights will be visible at a distance of 2 nautical miles. 12. [Reserved] 13. [Reserved] 14. The following harbor tugs are equipped with a hinged mast. When the mast is in the lowered position as during a towing alongside or pushing operation, the two masthead lights required by Rule 24(c), and the all around lights required by Rule 27(b)(1) will not be shown; however, an auxiliary masthead light not meeting with Annex I, section 2(a)(1) height requirement will be exhibited. 15. Task (restricted maneuverability) lights on the following ships do not comply with Annex I, section 3(c). 16. On the following ships, the arc of visibility of the forward masthead light, required by rule 21(a), may be obstructed at the following angles relative to ship's heading: 17. The second masthead light required by Rule 23(a)(ii) will not be displayed on the PC 1 Class. 18. On the following mine warfare type ships, the arc of visibility of the lower all-round minesweep lights required by Rule 27(f), may be obstructed through the following angles relative to the ship's heading: 19. Sidelights on the following ships do not comply with Annex I, Section 2 (g): |