Positions quoted in this Preliminary Notice reproduced below are referred to WGS84 or a compatible datum and may be plotted directly on this ENC. 
Some or all of the information contained in this Notice to Mariners may have been included on the ENCs affected.

2923(P)/25 PHILIPPINE ISLANDS — Luzon — Submarine cables. Works.
Source: NAMRIA NAVPHIL 97/25

	1. Submarine cable laying operations are taking place, joining the following positions:

	   18° 36' .40N. , 121° 04' .03E.
	   18° 39' .29N. , 121° 05' .49E.
	   18° 40' .70N. , 121° 07' .62E.
	   18° 41' .04N. , 121° 10' .65E.
	   18° 40' .64N. , 121° 15' .32E.
	   18° 39' .94N. , 121° 18' .10E.
	   18° 37' .75N. , 121° 21' .59E.
	   18° 31' .10N. , 121° 28' .80E.
	   18° 28' .80N. , 121° 30' .25E.
	   18° 25' .05N. , 121° 30' .59E.

	2. and

	   17° 57' .6N. , 120° 28' .5E.
	   17° 59' .1N. , 120° 26' .7E.
	   18° 06' .6N. , 120° 22' .3E.
	   18° 09' .4N. , 120° 21' .5E.
	   18° 10' .9N. , 120° 22' .2E.
	   18° 14' .7N. , 120° 22' .0E.
	   18° 24' .4N. , 120° 23' .7E.
	   18° 33' .6N. , 120° 28' .6E.
	   18° 38' .1N. , 120° 33' .3E.
	   18° 40' .6N. , 120° 39' .5E.
	   18° 42' .3N. , 120° 41' .5E.
	   18° 43' .0N. , 120° 43' .2E.
	   18° 42' .8N. , 120° 51' .8E.
	   18° 42' .0N. , 120° 55' .2E.
	   18° 42' .2N. , 120° 59' .6E.
	   18° 41' .5N. , 121° 01' .4E.
	   18° 39' .2N. , 121° 04' .5E.
	   18° 36' .4N. , 121° 04' .0E.

	3. and

	   17° 57' .6N. , 120° 28' .5E.
	   17° 56' .4N. , 120° 20' .6E.
	   17° 54' .4N. , 120° 17' .2E.
	   17° 49' .7N. , 120° 13' .7E.
	   17° 40' .5N. , 120° 11' .1E.
	   17° 37' .8N. , 120° 11' .4E.
	   17° 36' .0N. , 120° 12' .4E.
	   17° 33' .0N. , 120° 17' .5E.
	   17° 30' .7N. , 120° 20' .0E.
	   17° 29' .6N. , 120° 22' .6E.
	   17° 27' .8N. , 120° 24' .2E.
	   17° 27' .0N. , 120° 24' .2E.
	   17° 26' .2N. , 120° 24' .9E.
	   17° 23' .5N. , 120° 24' .1E.
	   17° 21' .4N. , 120° 24' .8E.
	   17° 17' .3N. , 120° 22' .8E.
	   17° 13' .9N. , 120° 22' .3E.
	   17° 08' .0N. , 120° 23' .4E.
	   17° 05' .6N. , 120° 23' .3E.
	   17° 00' .7N. , 120° 21' .0E.
	   16° 59' .5N. , 120° 21' .0E.
	   16° 57' .5N. , 120° 20' .2E.
	   16° 55' .6N. , 120° 20' .1E.
	   16° 53' .5N. , 120° 20' .7E.
	   16° 51' .6N. , 120° 22' .7E.

	4. and

	   15° 53' .1N. , 119° 53' .6E.
	   15° 54' .2N. , 119° 50' .8E.
	   15° 53' .8N. , 119° 47' .7E.
	   15° 55' .0N. , 119° 40' .4E.
	   15° 55' .8N. , 119° 38' .7E.
	   15° 57' .4N. , 119° 37' .5E.
	   15° 59' .8N. , 119° 36' .1E.
	   16° 02' .4N. , 119° 35' .8E.
	   16° 11' .4N. , 119° 36' .8E.
	   16° 20' .1N. , 119° 36' .5E.
	   16° 21' .5N. , 119° 37' .2E.
	   16° 22' .5N. , 119° 38' .1E.
	   16° 24' .8N. , 119° 39' .0E.
	   16° 26' .8N. , 119° 41' .4E.
	   16° 28' .2N. , 119° 44' .0E.
	   16° 30' .6N. , 119° 45' .9E.
	   16° 45' .1N. , 120° 03' .0E.
	   16° 47' .5N. , 120° 04' .7E.
	   16° 48' .2N. , 120° 05' .6E.
	   16° 48' .5N. , 120° 06' .7E.
	   16° 50' .7N. , 120° 10' .3E.
	   16° 51' .3N. , 120° 14' .2E.
	   16° 52' .2N. , 120° 16' .8E.
	   16° 52' .3N. , 120° 20' .1E.
	   16° 51' .6N. , 120° 22' .7E.

	5. and

	   15° 53' .07N. , 119° 53' .56E.
	   15° 52' .35N. , 119° 52' .73E.
	   15° 52' .80N. , 119° 49' .85E.
	   15° 52' .51N. , 119° 48' .62E.
	   15° 50' .51N. , 119° 45' .64E.
	   15° 46' .46N. , 119° 41' .22E.
	   15° 43' .15N. , 119° 40' .38E.
	   15° 30' .01N. , 119° 41' .98E.
	   15° 24' .92N. , 119° 43' .56E.
	   15° 18' .78N. , 119° 49' .69E.
	   15° 17' .54N. , 119° 56' .11E.
	   15° 16' .24N. , 119° 58' .14E.
	   15° 14' .69N. , 119° 58' .67E.
	   15° 12' .36N. , 119° 57' .29E.
	   15° 10' .17N. , 119° 57' .12E.
	   15° 07' .24N. , 119° 58' .11E.
	   15° 04' .03N. , 120° 01' .61E.
	   15° 03' .65N. , 120° 03' .64E.

	6. Mariners are advised to navigate with caution in the area.

	   (WGS84 DATUM)