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JMA-2343/2344 - ProNav

JMA-2343/2344 - ProNav

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3.3.11 Measuring the range to the target<br />

To measure the range to the target, the operator may take one of the following actions.<br />

• Use VRM (Variable Range Markers)<br />

• Move the center of the VRM (floating EBL)<br />

• Use the parallel line cursor<br />

• Use the cursor<br />

1. Using VRM<br />

• A VRM is a circle that is displayed on the PPI screen.<br />

• Since the size of the VRM may be change at will using the upper or lower portion<br />

of the cross key, the operator is able to measure the range of any desired target.<br />

• This radar equipment is capable of displaying two VRM simultaneously (#1VRM<br />

and #2VRM).<br />

• The #1VRM and #2VRM are displayed, selected and erased using the<br />

VRM<br />

key.<br />

• Whether or not the #2VRM is enabled is set at the menu.<br />

• A VRM can take on the following states:<br />

The VRM is not displayed.<br />

The VRM is displayed<br />

The cross key is not in VRM mode.<br />

The cross key is in VRM mode<br />

The VRM to be used (#1VRM or #2VRM) is not selected.<br />

The VRM to be used (#1VRM or #2VRM) is selected.<br />

Measuring the distance from the ship using #1VRM<br />

(a) Select "FIX" in the line "EBL1/VRM1" - the menu "FUNCTION".<br />

The #1VRM value represents the distance from the ship.<br />

The center of #2VRM is always fixed at the position of the ship.<br />

Setting whether or not use of #2VRM is enabled<br />

(a) Select "YES" in the line "VRM2" - the menu "FUNCTION".<br />

Use of #2VRM will be enabled.<br />

If "NO" is selected, use of #2VRM will be disabled.<br />

Operating the #1VRM/#2VRM<br />

(a) Push the<br />

VRM<br />

key.<br />

Each time the VRM key is pushed, the VRM that may be operated using the cross<br />

key changes sequentially between #1VRM and #2VRM.<br />

The #1VRM/#2VRM that is currently enabled is the VRM value at the upper left<br />

of the screen that is enclosed with dotted lines.<br />

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