
<section id='BaseOps_MilitaryOperatingAreaChunk_id'
webfilename='militaryoperatingareachunk'>
    <title>
        Editing Military Operations Areas
    </title>
    <para>
        A military operations area (MOA) is a region of airspace where
        aircraft engage in dispersed operations. Vertically, MOAs are
        defined by floor and ceiling altitudes. Horizontally, they are
        defined by a polygon consisting of three or more geographic points.
    </para>
    <exhibit>
        <img src='BaseOps_MilitaryOperatingArea_Figure.png'
        standard_colors='true'/>
    </exhibit>
    <para>
        MOAs are used by the MRNMap noise model. Unless
        that model is selected, the parts of the BaseOps user
        interface dealing with MOAs will be hidden. See <iref
        target='BaseOps_NoiseModelsUsed_id'/>.
    </para>
    <para>
        To work with MOAs, choose Military Operations Areas from the <link
        target='#BaseOps_ListPane_id'>object type selector dropdown list</link>.
        MOAs can be added, duplicated, and deleted as described in <iref
        target='BaseOps_ListPane_id'/>.
    </para>
    <note type='tip'>
        <para>
            BaseOps can import MOAs from DAFIF. See <iref
            target='BaseOps_ImportingFromDAFIF_id'/>.
        </para>
    </note>
    <para>
        To edit a MOA, first select it in the <link
        target='#BaseOps_ListPane_id'>object list</link>, then edit its
        properties in the <link
        target='#WCF_ApplicationMainWindow_id'>text pane</link>.
    </para>
    <exhibit>
        <img
        src='BaseOps_MilitaryOperatingAreaChunk_TextPane_ScreenCap.png'/>
    </exhibit>
    <para>
        MOAs have the following properties.
    </para>
    <unorderedlist>
        [-include "BaseOps_NameLongNameNotes_ListItems.rxl" ObjectTypeName='MOA'-]
        <listitem>
            <para>
                <italic>Floor</italic> -<linebreak/>
                <italic>Ceiling</italic> - The minimum and maximum flight levels
                for this MOA. [-include "BaseOps_HeightInputControl_UsageSentence.txt"-]
            </para>
            <para>
                You can change the units used to specify heights: see <iref
                target='BaseOps_CaseUnits_id'/>.
            </para>
        </listitem>
        <listitem>
            <para>
                <italic>Area</italic> - The area within the MOA's boundary. The
                area is automatically updated as you edit the MOA.
            </para>
            <para>
                You can change the units used to specify the area: see <iref
                target='BaseOps_CaseUnits_id'/>.
            </para>
        </listitem>
        <listitem>
            <para>
                <italic>Points</italic> - The geographic coordinates of the vertex
                points of the polygon that defines the MOA's horizontal boundary.
                The points are presented in a table.
            </para>
            <para>
                A minimum of three points must be defined. The polygon must have
                non-zero area, and the sides must not cross each other. The polygon's
                vertex points can be defined in either the clockwise or the counterclockwise
                direction.
            </para>
            <para>
                You can change the coordinate system used to specify the points:
                see <iref target='BaseOps_CaseCoordinateSystem_id'/>.
            </para>
            <para>
                The triangle icon <img
                src='intres:BaseOps_RowSelectionIcon_Selected_CroppedForDocumentation'/>
                indicates the selected point. To select another point, either
                click somewhere on that point's row, or navigate to that point
                using the <keytext>Tab</keytext> key. Alternatively, click on
                that point on the map using the <link
                target='#BaseOps_MouseTool_SelectAndEdit_id'>Select and Edit mouse
                tool</link>&nbsp;<img
                src='intres:WCF_ArrowMouseCursorToolbarButtonBitmap'/>.
            </para>
            <para>
                To add a new point, either press the Add New Point button <img
                src='intres:BaseOps_AddPlusSignSmallButtonBitmap'/>, or press
                <keytext>Ctrl + A</keytext>. Alternatively, use the <link
                target='#BaseOps_MouseTool_Add_id'>Add mouse tool</link>&nbsp;<img
                src='intres:BaseOps_AddTool_ToolbarButton'/> to add new points
                by clicking on the map. New points are added to the polygon boundary
                after the selected point.
            </para>
            <note type='tip'>
                <para>
                    When editing MOAs on the map, you will often find yourself switching
                    back and forth between using the Select and Edit and the Add mouse
                    tools. As a convenience in such situations, hold down the <keytext>Ctrl</keytext>
                    key to make the Add mouse tool temporarily act like the Select
                    and Edit mouse tool, and vice versa.
                </para>
            </note>
            <para>
                To delete the selected point, either press the Delete Point button
                <img src='intres:WCF_DeleteCrossToolbarButtonBitmap'/>, or press
                <keytext>Ctrl + Del</keytext>.
            </para>
            <para>
                To move the selected point up or down in the table, press the
                Move Up and Move Down buttons <img
                src='intres:WCF_MoveUpToolbarButtonBitmap'/> and <img
                src='intres:WCF_MoveDownToolbarButtonBitmap'/>, or press <keytext>Ctrl
                + U</keytext> and <keytext>Ctrl + D</keytext>.
            </para>
        [-include "BaseOps_CopyPasteSegments.rxl" segment_name_lowercase='point' segment_name_uppercase='Point' object_name='MOA'-]
            <para>
                When you are editing a MOA, BaseOps marks the vertex points on
                the map. This makes it easier to edit the MOA using the mouse
                tools.
            </para>
            <exhibit>
                <img
                src='BaseOps_MilitaryOperatingAreaChunk_MapPane_PointsHighlighted_ScreenCap.png'/>
            </exhibit>
            <para>
                The upper-left point, highlighted in yellow, is the selected point.
            </para>
        </listitem>
    </unorderedlist>
</section>
