Sonar preview mode

1. A method for displaying sonar images, comprising:

displaying, on a regular pane, sonar images that are currently being recorded;

displaying, on a preview pane, condensed sonar images that had previously been recorded and that are currently being recorded while recording of the sonar images;

selecting, on the preview pane, a first portion of the condensed sonar images while the recording the sonar images occurs and while the regular pane is updated with the sonar images and while the preview pane is updated with the condensed sonar images; and

displaying the sonar images that correspond to the first portion on the regular pane.

2. The method of claim 1 , wherein the preview pane is disposed above the regular pane.

3. The method of claim 1 , wherein the preview pane is smaller in size than the regular pane.

4. The method of claim 1 , wherein the condensed sonar images comprise condensed versions of all the sonar images that are stored in active memory.

5. The method of claim 1 , wherein the condensed sonar images are smaller than the sonar images and indicate selectable features of the sonar images.

6. The method of claim 1 , wherein the first portion is highlighted by a semi-transparent box over the first portion.

7. The method of claim 1 , further comprising:

receiving a request to highlight a second portion of the condensed sonar images on the preview pane, wherein the second portion is different from the first portion;

highlighting the second portion of the condensed sonar images on the preview pane; and

displaying the sonar images that correspond to the second portion on the regular pane.

8. The method of claim 7 , wherein the request is a finger swipe.

9. The method of claim 7 , wherein the request is a touch.

10. An apparatus for displaying sonar images, the apparatus comprising:

one or more processors;

a screen;

memory having a plurality of executable instructions which, when executed by the one or more processors, cause the one or more processors to:

display sonar images that are being recorded at a present time;

display a condensed version of the sonar images that are being recorded at the present time and past sonar images on a second pane;

receive a request to display the past sonar images that had been recorded at a previous time while the first pane is updated with the sonar images recorded at the present time and while the second pane is updated with the condensed version of the sonar images, wherein the request is associated with either the first pane or the second pane; and

display, on the first pane, the past sonar images associated with the request while still displaying the sonar images that are currently being recorded at the present time.

11. The apparatus of claim 10 , wherein the plurality of executable instructions further cause the one or more processors to:

receive a request to display a portion of the sonar images that were captured at the present time while displaying the past sonar images; and

display the portion of the sonar images.

12. The apparatus of claim 11 , wherein the request to display the portion comprises a finger swipe over the past sonar images.

13. The apparatus of claim 10 , wherein the second pane is smaller than the first pane.

14. The apparatus of claim 10 , wherein the second pane is disposed above the first pane.

15. The apparatus of claim 10 , wherein the plurality of executable instructions further cause the one or more processors to:

highlight a first portion of the condensed version of the sonar images and the past sonar images on the second pane; and

display the sonar images that corresponds to the first portion on the first pane.

16. The apparatus of claim 15 , wherein the first portion is highlighted by a semi-transparent box over the first portion.

17. A non-transitory computer readable medium having stored thereon computer-executable instructions which, when executed by a computer, cause the computer to:

display, on a regular pane, sonar images that are currently being recorded; and

display, on a preview pane, condensed sonar images that had previously been recorded and that are currently being recorded, while recording the sonar images;

select, on the preview pane, a first portion of the condensed sonar images while the regular pane is updated with the sonar images and while the preview pane is updated with the condensed sonar images; and

display the sonar images that correspond to the first portion on the regular pane.

18. The non-transitory computer readable medium of claim 17 , wherein the preview pane is disposed above the regular pane.

19. The non-transitory computer readable medium of claim 17 , wherein the preview pane is smaller in size than the regular pane.