Narrative:

I was doing touch and go landings and takeoffs in my cessna 172 at vnc using the left traffic pattern for runway 23. The wind was 180 degrees at 15 kts. Other aircraft were also using runway 23. However; [another light aircraft] pilot elected to taxi for takeoff on runway 13; which intersects with runway 23.I reported left downwind and left base to runway 23 on CTAF. Just as I was going to announce turn to final runway 23; the [other] pilot asked my position on base. I immediately announced I was turning final. After a pause; the [other] pilot asked my distance on final. I responded I was on a short 3/10 of a mile final. The [other] pilot said he thought he had time to take off on runway 13. I responded 'I don't think so.' there was another aircraft waiting for takeoff on runway 23. The pilot of that aircraft seemed to know the [other] pilot using runway 13; and also told him by name that I was on short final. The [other] pilot said nothing further; which I interpreted to mean he was going to hold short until after my touch and go. I did the touch and go on runway 23 before the intersection with runway 13. I was about 500 ft in the air on takeoff as I was approaching the intersection with runway 13 and I saw the [other aircraft] about 200 feet below me climbing out from runway 13 and crossing runway 23. The pilot of the [other aircraft] made his first radio call since saying he thought he had time to take off; announcing he was clear of the intersection with runway 23. I did not have to take evasive action to avoid colliding with the [other aircraft]; but we were closer than prudent.this event could have been avoided entirely. The [other aircraft] pilot could have used runway 23; which other aircraft were already using and which is the preferred calm wind runway. Another option for the [other aircraft] pilot would have been heeding the advice of myself and the pilot of the aircraft waiting to use runway 23. We both advised that there was not enough time to make a safe departure on runway 13. Additionally; I should have proactively verified the [other aircraft] pilot was holding short by making another radio inquiry of his intentions after he had been advised that he did not have time to depart. However; I was focused on my landing and takeoff.

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Original NASA ASRS Text

Title: C172 pilot reported an NMAC with another light aircraft in the pattern at VNC airport.

Narrative: I was doing touch and go landings and takeoffs in my Cessna 172 at VNC using the left traffic pattern for Runway 23. The wind was 180 degrees at 15 kts. Other aircraft were also using Runway 23. However; [another light aircraft] pilot elected to taxi for takeoff on Runway 13; which intersects with Runway 23.I reported left downwind and left base to Runway 23 on CTAF. Just as I was going to announce turn to final Runway 23; the [other] pilot asked my position on base. I immediately announced I was turning final. After a pause; the [other] pilot asked my distance on final. I responded I was on a short 3/10 of a mile final. The [other] pilot said he thought he had time to take off on Runway 13. I responded 'I don't think so.' There was another aircraft waiting for takeoff on Runway 23. The pilot of that aircraft seemed to know the [other] pilot using Runway 13; and also told him by name that I was on short final. The [other] pilot said nothing further; which I interpreted to mean he was going to hold short until after my touch and go. I did the touch and go on Runway 23 before the intersection with Runway 13. I was about 500 ft in the air on takeoff as I was approaching the intersection with Runway 13 and I saw the [other aircraft] about 200 feet below me climbing out from Runway 13 and crossing Runway 23. The pilot of the [other aircraft] made his first radio call since saying he thought he had time to take off; announcing he was clear of the intersection with Runway 23. I did not have to take evasive action to avoid colliding with the [other aircraft]; but we were closer than prudent.This event could have been avoided entirely. The [other aircraft] pilot could have used Runway 23; which other aircraft were already using and which is the preferred calm wind runway. Another option for the [other aircraft] pilot would have been heeding the advice of myself and the pilot of the aircraft waiting to use Runway 23. We both advised that there was not enough time to make a safe departure on Runway 13. Additionally; I should have proactively verified the [other aircraft] pilot was holding short by making another radio inquiry of his intentions after he had been advised that he did not have time to depart. However; I was focused on my landing and takeoff.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.