=== Usage ===
==== Surveying ====
:A dioptra is utilized by activating it and right-clicking another player holding a range pole. There will be a '''Survey''' option with automatic event log messages as follows:
:{{event|inline|You carefully place the dioptra on its tripod in front of you.<br />You make sure the dioptra is level.<br />You point the dioptra at <Player>.<br />You wave at <Player>.<br />You line up the dioptra with <Player>.<br />You look through the dioptra.<br />You focus on the range pole.<br />You read the graduations on the range pole and work out the height difference.<br /><Player> is <xx> tiles <North/South> and <xx> tiles <East/West> of you. Also you appear to be <xx> dirt <higher/lower> than <Player>.<br />You stop surveying.<br />You pack up the dioptra.}}
:If your helper is standing in water, you also get the height you are above water.
:*'''Note:''' Your helper's stamina is drained while they are holding the range pole, which may result in drowning when holding the pole in water.
:{{event|inline|As your helper is stood in water, you work out how high you are above the water, and it is <xx>.}}
==== Navigation ====
:Activate the dioptra and right-click any of Wurm's [[moons]] and select '''Use'''. Your general geographical location will be displayed in the event window.
:{{event|inline|You carefully place the dioptra on its tripod in front of you.<br>You make sure the dioptra is level.<br>You line up the dioptra with <moon>.<br>You work out you are in the <location> regions.<br>You pack up the dioptra.}}
==== Bridge planning ====
:A dioptra is utilized by activating it and right-clicking another player holding a [[range pole]]. There will be a '''Plan Bridge''' option which will proceed to plan the bridge with automatic event log messages as follows:
:{{event|inline|You carefully place the dioptra on its tripod in front of you.<br>You make sure the dioptra is level.<br>You point the dioptra at <Player>.<br>You wave at <Player>.<br>You line up the dioptra with <Player>.<br>You look through the dioptra.<br>You focus on the range pole.<br>You read the graduations on the range pole and work out the height difference.<br>You check the heights of the plan ends.<br>You appear to be <xx> dirt <Higher/lower> than <Player>.<br>You work out the orientation and width for the bridge.<br>You check for clearance between the bridge ends.<br>You check for protruding foliage.<br>You check for nearby cave entrances.<br>You check for any items in the way.<br>You check that you have permissions to build the bridge.<br>You check for any bridges that may interfere with this bridge.<br>You check there would be no buildings under this bridge.<br>You work out the styles of bridges that would fit.<br>You start working out the bridge components required.<br>Planned bridge area is <x> tile(s) long and <x> tile(s) wide.<br>You stop surveying.<br>You pack up the dioptra.}}
:Should there be any reason why the bridge can not be planned, it will interrupt the sequence with the appropriate message.
=== Creation ===