Some C# parsing...

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace recParser
{
    class Program
    {
        static void Main(string[] args)
        {
            /*gamiee has been here ^^*/
            BinaryReader br = new BinaryReader(File.OpenRead("ais_2013-06-20_190159.rec"));
            while (br.BaseStream.Position != br.BaseStream.Length)
            {
                byte[] header = br.ReadBytes(2); //precita 2 byte
                Array.Reverse(header); //otoci kvoli big endianu
                byte[] goodHeader = { 255, 255 }; //0xFFFF
                if (!header.SequenceEqual(goodHeader)) //porovnava headre
                {
                    Console.WriteLine("Wrong header!");
                    Console.ReadLine();
                }
                //timestamp by mal mat asi 4byte?!?
                byte[] time = br.ReadBytes(4);
                Array.Reverse(time);
                Int32 timestamp = BitConverter.ToInt32(time, 0);
                //ziskat datetime z unixoveho timestampu ide troska inak v c#
                DateTime datetime = new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);
                datetime = datetime.AddSeconds(timestamp);
                //dlzka
                byte[] dataLenght = br.ReadBytes(2);
                Array.Reverse(dataLenght);
                Int16 dataLen = BitConverter.ToInt16(dataLenght, 0);
                byte[] data = br.ReadBytes(dataLen);
                Array.Reverse(data);
            }
        }
    }
}