The Belknap Pole mounted Forward/Lower Masthead Light; - (continued)
together with:-
- a) associated black screen (and chocks)
- b) associated Glare Shield.
The following attachments are included in an attempt to highlight the configuration of the Glare Shields associated with the fwd/lower masthead light as fitted atop the Belknap Poles on the US Navy aircraft carrier fleet. It will be seen that unlike the 'normal' configuration on lesser ships where the glare shields are designed/configured to obviate any glare below/ahead of the light. On the US Navy aircraft carriers these Glare Shields appear to be so profiled so as to provide considerable glare avoidance on the forward flight deck area in addition to forward of the light.
(double click this attachment for a clear view)
(3rd attachment; note that both the fwd/lower and aft/upper masthead lights are switched on in this image)
Navigation Lights and Glare Shields
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Little h
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Re: Navigation Lights and Glare Shields
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Little h
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Little h
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Re: Navigation Lights and Glare Shields
USS John C. Stennis (CVN 74); Belknap Pole Tribute
Tribute to the Sailors who lost their lives in the USS Belknap (CG-26) - USS John F. Kennedy (CV 67) collision on Nov. 22, 1975
BREMERTON, WA, UNITED STATES
06.19.2014
Photo by James S Lyon
USS John C. Stennis (CVN 74)
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Quartermaster Seaman Nicholas Fisher, from Salt Lake City, paints the names of ships and Sailors in memory of seven Sailors who lost their lives when the USS Belknap (CG-26) collided with USS John F. Kennedy (CV 67) on Nov. 22, 1975. After the accident carriers started installing Belknap poles to provide navigators on the bridge with a solid reference point for the ships heading. The Nimitz-class aircraft carrier USS John C. Stennis (CVN 74) is currently undergoing a Docking Planned Incremental Availability maintenance period at Puget Sound Naval Shipyard and Intermediate Maintenance Facility. (U.S. Navy Photo by Mass Communication Specialist 3rd Class James Lyon / Released)
Source; DVIDS Defense Visual Information Distributin Service
Tribute to the Sailors who lost their lives in the USS Belknap (CG-26) - USS John F. Kennedy (CV 67) collision on Nov. 22, 1975
BREMERTON, WA, UNITED STATES
06.19.2014
Photo by James S Lyon
USS John C. Stennis (CVN 74)
Subscribe 76
Quartermaster Seaman Nicholas Fisher, from Salt Lake City, paints the names of ships and Sailors in memory of seven Sailors who lost their lives when the USS Belknap (CG-26) collided with USS John F. Kennedy (CV 67) on Nov. 22, 1975. After the accident carriers started installing Belknap poles to provide navigators on the bridge with a solid reference point for the ships heading. The Nimitz-class aircraft carrier USS John C. Stennis (CVN 74) is currently undergoing a Docking Planned Incremental Availability maintenance period at Puget Sound Naval Shipyard and Intermediate Maintenance Facility. (U.S. Navy Photo by Mass Communication Specialist 3rd Class James Lyon / Released)
Source; DVIDS Defense Visual Information Distributin Service
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Little h
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Little h
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Re: Navigation Lights and Glare Shields
The next of my observations relates to something a little different .... yet with some similarities; it's a polemast/foremast again - this time seen mounted on the forecastle/foredeck - and yes .... it comes with lights and accoutremounts near the top and even surmounting it!!!
RFA Argus (A135); Primary Casualty Receiving Ship (PCRS).
The polemast/foremast is supported by four stays and is braced(flange) at and just above deck level. The uppermost 5% to 10% (estimated) of the pole mast is completed with a further pole/tube section having a somewhat smaller diameter. Attached at the extreme top and at front of the larger diamater polemast and secured to the narrower diamater extension is an L shaped bracket. The base plate of the L shaped bracket carries a pair of vertically separated lights both of which appear to have integral screens & chocks - these are presumed to be the fwd/lower masthead light(s).
A further pair of lights mounte (not apparently screened or with chocks) surmounts a round perforated plate or disc that is secured atop the combined polemast construction.
A particular feature mounted atop the polemast and surrounding the upper pair of lights is in the shape of a triangle comprised of (what appears to be) three white rods, possibly hinged, clipped or shackled at each end.
One of the white rods is mounted in the horizontal and welded to both a) the light(s) base ring or disc and b) the upper edge of the back plate of the 'L' shaped bracket on which is secured the fwd/lower masthead light. upright triangle mounted atop the pole mast.
The other two white rods help form the triangular shape and at their apex are each attached to a vertical rod that has securing points on to, and aft of, the upper reaches of the pole mast .... as will be evident in the following attachments the action of securing the two rods in this manner is that the triangle is consequently tilted back (aft) from the perpendicular - by approximately the length/distance of the diameter of the pole.
Attachments
- 1st, 2nd & 3rd attachments; three identify the layout of the lights as seen from different angles.
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4th & 5th attachments are cropped to identify more closely the two sets of lights and the white rods in a triangular shape.
legend
lower red arrow = suspected pair of fwd lower masthead lights(?) vertically mounted (no vertical separation)
upper red arrow = pair of lights vertically mounted (no vertical separation) - function as yet unknown
yellow arrow = white rods forming a rectangular shape - function as yet unknown
gold arrow = indicates vertical rod to which the apex of white rods are attached(?)
RFA Argus (A135); Primary Casualty Receiving Ship (PCRS).
The polemast/foremast is supported by four stays and is braced(flange) at and just above deck level. The uppermost 5% to 10% (estimated) of the pole mast is completed with a further pole/tube section having a somewhat smaller diameter. Attached at the extreme top and at front of the larger diamater polemast and secured to the narrower diamater extension is an L shaped bracket. The base plate of the L shaped bracket carries a pair of vertically separated lights both of which appear to have integral screens & chocks - these are presumed to be the fwd/lower masthead light(s).
A further pair of lights mounte (not apparently screened or with chocks) surmounts a round perforated plate or disc that is secured atop the combined polemast construction.
A particular feature mounted atop the polemast and surrounding the upper pair of lights is in the shape of a triangle comprised of (what appears to be) three white rods, possibly hinged, clipped or shackled at each end.
One of the white rods is mounted in the horizontal and welded to both a) the light(s) base ring or disc and b) the upper edge of the back plate of the 'L' shaped bracket on which is secured the fwd/lower masthead light. upright triangle mounted atop the pole mast.
The other two white rods help form the triangular shape and at their apex are each attached to a vertical rod that has securing points on to, and aft of, the upper reaches of the pole mast .... as will be evident in the following attachments the action of securing the two rods in this manner is that the triangle is consequently tilted back (aft) from the perpendicular - by approximately the length/distance of the diameter of the pole.
Attachments
- 1st, 2nd & 3rd attachments; three identify the layout of the lights as seen from different angles.
---------------------
4th & 5th attachments are cropped to identify more closely the two sets of lights and the white rods in a triangular shape.
legend
lower red arrow = suspected pair of fwd lower masthead lights(?) vertically mounted (no vertical separation)
upper red arrow = pair of lights vertically mounted (no vertical separation) - function as yet unknown
yellow arrow = white rods forming a rectangular shape - function as yet unknown
gold arrow = indicates vertical rod to which the apex of white rods are attached(?)
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Little h
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Little h
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Re: Navigation Lights and Glare Shields
RFA Argus (A135); Primary Casualty Receiving Ship (PCRS). - (continued)
Two attachments left out of the previous post are now included below.
Note that both attachments include the aft/upper masthead light.
(taken from jetty level, off the stbd bow - looking aft)
(taken from jetty level, wide off the stbd bow)
Two attachments left out of the previous post are now included below.
Note that both attachments include the aft/upper masthead light.
(taken from jetty level, off the stbd bow - looking aft)
(taken from jetty level, wide off the stbd bow)
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Little h
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Little h
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Re: Navigation Lights and Glare Shields
Littoral Combat Ships of US Navy - Freedom Class variant
Both the lower/fwd and upper/aft masthead lights are mounted without a) external black screens and b) glare shields. The lower/fwd masthead light is mounted on the ship centre line on the bridge roof.
The side lights are mounted on simple angle bracket(s) and base plate arrangments, outboard of but close to the respective port and starboard deckhouse tumblehome bulwarks. The brackets are below and affixed to the underside of the port and starboard bridge wings.
Both the lower/fwd and upper/aft masthead lights are mounted without a) external black screens and b) glare shields. The lower/fwd masthead light is mounted on the ship centre line on the bridge roof.
The side lights are mounted on simple angle bracket(s) and base plate arrangments, outboard of but close to the respective port and starboard deckhouse tumblehome bulwarks. The brackets are below and affixed to the underside of the port and starboard bridge wings.
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Little h
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Little h
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Re: Navigation Lights and Glare Shields
Littoral Combat Ships of US Navy - Independence Class variant
Not at all similar to the Freedom class vessels and displaying a number of variations particularly relating to the lower/fwd masthead light location; see:-
.... and now we know the configuration in this attachment derived from a screenshot taken off a video of the Commissioning Ceremony of USS Omaha LCS-10
Not at all similar to the Freedom class vessels and displaying a number of variations particularly relating to the lower/fwd masthead light location; see:-
.... and now we know the configuration in this attachment derived from a screenshot taken off a video of the Commissioning Ceremony of USS Omaha LCS-10
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Little h