3e SRD:Search Skill
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The character generally must be within 10 feet of the object or surface to be searched. It takes 1 round to search a 5-foot-by-5-foot area or a volume of goods 5 feet on a side; doing so is a full-round action.
|Ransack a chest full of junk to find a certain item||10|
|Notice a typical secret door or a simple trap||20|
|Find a difficult nonmagical trap not of stone (rogue only)*||21+|
|Find a magic trap (rogue only)*||25+ spell level used to create|
|Notice a well-hidden secret door||30|
*Dwarves who are not rogues can use Search to do this if the trap is built into or out of stone.
Active Abjuration spells within 10 feet of each other for 24 hours or more create barely visible energy fluctuations. These fluctuations give characters a +4 bonus to Search checks to locate such Abjuration spells.
While anyone can use Search to find a trap whose DC is 20 or less, only a rogue can use Search to locate traps with higher DCs. Finding a nonmagical trap has a DC of at least 20, and the DC is higher if it is well hidden. Finding a magic trap has a DC of 25 plus the level of the spell used to create it. Identifying the location of a snare spell has a DC of 23.
A character who does not have the Track feat can use the Search skill to find tracks, but can only follow tracks if the DC is 10 or less.