Michael Kavanagh, Ballybough, Greencastle, captain of the McKee boat admitted failing to make an accurate landing declaration of catch within 48 hours on October 1 2004.
Brendan Gill, The Cottage, Greencastle, captain of the Brendallon, also pleaded guilty to failing to make an accurate landing declaration of catch within 48 hours on September 28 2004.
Both defendants had denied the charges when initially arraigned at Donegal circuit court this morning.
Kavanagh was originally arraigned this morning on two charges relating to dates on September 27 and October 1.
And Gill was arraigned on two charges relating to dates on September 13 and September 30
But they changed their pleas to guilty on one charge each, after lunch, following an adjournment before Judge Keenan Johnson.
Counsel for the Attorney General, Tom O’Connell said the State was accepting the plea.
The State entered a nolle prosequi in respect of the other charges.
Both skippers will sentenced tomorrow morning.