TM 55-1930-209-14&P-10
Mounting Instructions
Type AQUA SIGNAL 70/70 D (single optic/double optic)
These Navigation lights comply with national and international regulations regarding minimum visibility, luminous
intensity of horizontal and vertical sectors and color specifications for all vessels of 20 meters or more in length (IMCO
1972).
Lights carrying an tt besides the DHI-symbol may be utilized on German inland waterways.
However, their correct function may be guaranteed only if special attention is paid to certain points regarding mounting
and servicing. It is therefore essential to read the following pages cautiously and to follow the mounting instructions in
the same way.
Important:
The upper part of the' lantern with double optic is always to be used for the main-lightning and the lower part for the
spare-lightning.
Regulations
For foreign ships Annex I - Positioning and Technical Details of Lights and Shapes - of the new Collision Regulations,
1972, are to be applied.
The technical data, regarding horizontal and vertical positioning and spacing of the navigation lights, laid down in these
mounting instructions do apply to all ships, no matter what nationality they are.
Side lights AQUA SIGNAL 70
No. of approval: DHI/01/05/75 (Deutsches Hydrographisches Institut)
Side lights AQUA SIGNAL 70 D
No. of approval: DHI/01/05/1/75
Horizontal sector 11 2, 5"
Visibility 3 nautical miles
The Side lights must be mounted in such a way that the horizontal plane A
of the
light is parallel to the CWL (pict. 1).
Special attention is to be paid to the right ahead direction. It is important
that the measurement , , X" shown in pict. 2 and table 2. 1 is always
correct. If it is to small, the light intensity in the right ahead direction may
be reduced.
Masthead lights AQUA SIGNAL 70
No. of approval: DHI/O 1/05/75 (Deutsches Hydrographisches Institut)
Masthead lights AQUA SIGNAL 70 D
No. of approval: DHI/01/05/1/75
Horizontal sector 225°
Visibility 6 nautical miles
The Masthead light must be mounted in such a way that the horizontal
plane A of the light is parallel to the construction water line (CWL) (pict.
1). For proper mounting see pict. 3.
If more than one Masthead light is to be fitted - annex 1 - of the Collision
Regulations 1972 is to be looked at. For vertical and horizontal
positioning and spacing of the lights in general see pict. 1.
Stern light AQUA SIGNAL 70
No. of approval: DHI/01 /05/75 (Deutsches Hydrographisches Institut)
Stern light AQUA SIGNAL 70 D
No. of approval: DHI/01 /05/1/75
Horizontal sector 135°
Visibility 3 nautical miles
The Stern light must be mounted in such a way that the horizontal plane A
of the light is parallel to the construction water line (CWL) (pict. 1).
The right astern direction is marked on the light as shown on the pict. 4.
It should be in and above the keel line. The rear of the light should be
aligned twarthships.
For proper mounting see pict. 4.
