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Acceptance of other provision(s) with respect to positioning of navigational lights on Indian Tugs OSVs and PSVs.
Applicable to:
Indian Tugs, OSVs, and PSVs
Effective Date:
02.05.2019
Superseded Circulars:
None
Key Changes and Requirements
1. Acceptance of Other Provisions — MS (Prevention of Collisions at Sea) Rules, 1975
The Directorate has approved alternative provisions for positioning navigational lights on Indian Tugs, OSVs, and PSVs due to their special construction or purpose.
- Closest Possible Compliance: Alternative provisions that ensure the closest possible compliance with MS (Prevention of Collisions at Sea) Rules, 1975.
2. Accepted Alternatives
II/4 Alternative provisions for positioning navigational lights on Indian Tugs, OSVs, and PSVs
- Sternlight: May be positioned at the aft end of accommodation, showing an unbroken light over an arc of the horizon of 135 degrees and so fixed as to show the light 67.5 degrees from right aft on each side of the vessel.
- Towing Light: May be positioned in a vertical line above the sternlight at the aft end of accommodation, showing an unbroken light over an arc of the horizon of 135 degrees and so fixed as to show the light 67.5 degrees from right aft on each side of the vessel.
- Masthead Lights: Relaxation in horizontal distance and positioning is acceptable, subject to conditions.
- Side Lights: May be positioned inwards from the ship's side, not more than 10% of the breadth of the vessel inboard from the side, up to a maximum of 1.5 meters.
- Vertical Spacing: Relaxation in vertical spacing between lights is acceptable, subject to conditions.
- Aft Anchor Light: May be positioned at the aft end of accommodation, provided it remains positioned lower than the forward anchor light and exhibits an unbroken light over an arc of the horizon of 360 degrees.
3. Compliance and Endorsement
Recognised Organisations (ROs) should follow this notice when examining/approving Lights, Shapes, and Sound Signals (L&SS) plans. Vessels complying with the closest possible compliance(s) need not refer their L&SS plans to the Directorate. The accepted rule(s) should be endorsed on the L&SS plan, and a copy of this MS Notice should be kept with the approved L&SS plan at all times.
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