im not sure
beat the ice temple
the second crest is the tiforce if your asking about phantom hourglass
well the first time its a hourglass the second time its a triforce
if you meaqn by sea chart then all of them are in the ocean temple you can not obtain them all at once.
the first time you go to the temple symbol door the crest is an hourglass, the second time it is the tri-force triangle, picture of tri-force triangle here: http://upload.wikimedia.org/wikipedia/commons/thumb/8/86/Triforce.svg/512px-Triforce.svg.png
What do you mean? If you mean for that door ythe first is an hourglass ( two sevens but one is upside down. ) The second is the triforce but you must draw it in a special way. Start with the middle line.
Get it from the second knight
take the second passage way and use the sun key to open the door
The sacred crest that you draw on the red door is an hourglass the first time and the second time is the triforce but the triforce must be drawn in a special way.
you go to the second unded island you get the hamer in the temple then you go through a big maze it was really confusing.
if your in the temple of the ocean king, (the first time you need to use the crest) then it is an hourglass, but if you are in the temple of the ocean king the second time (and after that) you will know by then.